bluuebunny/crossref_metadata_2025_split huggingface dataset:
Risk factors for complications after partial splenic embolization for liver cirrhosis
Authors: Hayashi H , Beppu T , Okabe K , Masuda T , Okabe H , Baba H 
Published: April 2008

Abstract

Background
Partial splenic embolization (PSE) in patients with cirrhosis can achieve a prolonged increase in blood cell count. However, there is little information on the risk factors for complications after PSE for liver cirrhosis.

Methods
Seventy patients (41 men and 29 women) with cirrhosis-induced hypersplenism underwent PSE. Based on the Child–Pugh classification, 30, 35 and five patients had class A, B and C disease respectively. Risk factors for complications after PSE were examined retrospectively by logistic regression analysis.

Results
The mean splenic infarction rate was 77·1 per cent. Twelve patients (17 per cent) had complications following PSE. In univariable analysis, Child–Pugh class C, total bilirubin level of 1·4 mg/dl or more, serum albumin level of 2·8 g/dl or less and infarcted splenic volume of 540 ml or more were significantly associated with complications after PSE. In multivariable analysis, Child–Pugh class C (P = 0·012) and infarcted splenic volume of 540 ml or more (P = 0·031) were identified as risk factors, with an odds ratio of 22·92 and 5·01 respectively.

Conclusion
Child–Pugh class C and a large splenic infarction volume are risk factors for complications after PSE for liver cirrhosis.
Sacral nerve stimulation for faecal incontinence alters colorectal transport
Authors: Michelsen H B , Christensen P , Krogh K , Rosenkilde M , Buntzen S , Theil J , Laurberg S 
Published: April 2008

Abstract

Background
Sacral nerve stimulation reduces the frequency of defaecation in patients with faecal incontinence. The aim of this study was to examine the mechanism behind the reduced number of bowel movements in incontinent patients treated with sacral nerve stimulation.

Methods
The study included 20 patients with faecal incontinence and a positive percutaneous nerve evaluation test: 19 women and one man, with a median age of 63 (range 28–78) years. Colorectal scintigraphy was performed to assess colorectal emptying at defaecation before and after implantation. Segmental colorectal transit times were determined using radio-opaque markers.

Results
The median frequency of defaecation per 3 weeks decreased from 56 (range 19–136) to 26 (range 12–78) (P &lt; 0·002). At defaecation, antegrade transport from the ascending colon decreased from a median score of 8 (range 0–23) to 0 (range 0–11) per cent (P = 0·001), while retrograde transport from the descending colon increased from a median score of 0 (range 0–14) to 2 (range 0–30) per cent (P = 0·039). The median defaecation score was unchanged. There was a non-significant increase in median total gastrointestinal transit time from 2·5 (range 0·9–6·2) to 3·3 (range 0·8–6·2) days (P = 0·079).

Conclusion
Sacral nerve stimulation reduces antegrade transport from the ascending colon and increases retrograde transport from the descending colon at defaecation. This may prolong colonic transit time and increase the storage capacity of the colon.
Peritoneal lavage cytology in patients with oesophagogastric adenocarcinoma
Authors: Nath J , Moorthy K , Taniere P , Hallissey M , Alderson D 
Published: April 2008

AbstractBackgroundThe aim of the study was to determine the value of performing peritoneal lavage cytology during laparoscopy in the management of oesophagogastric adenocarcinoma.MethodsLaparoscopy combined with peritoneal cytology was performed in patients with potentially resectable oesophagogastric adenocarcinoma. Macroscopic peritoneal findings at laparoscopy and the presence of free peritoneal tumour cells were recorded. All patients were followed to death or the census point. Patients with overt peritoneal disease or positive cytology were offered palliative chemotherapy, subject to performance status.ResultsForty-eight (18·8 per cent) of 255 patients had overt peritoneal metastases at staging laparoscopy. Fifteen (7·2 per cent) of the remaining 207 patients had positive cytology; these patients had a median (95 per cent confidence interval) survival of 13 (3·1 to 22·9) months, versus 9 (7·4 to 10·6) months for those with overt peritoneal metastases (P = 0·517). Of patients receiving chemotherapy, those without overt metastases had a slight survival advantage over patients with metastases (median 15 (10·8 to 19·2) versus 9 (7·4 to 10·7) months; P = 0·045).ConclusionPositive peritoneal cytology in the absence of overt peritoneal metastases is not uncommon in oesophagogastric adenocarcinoma. It is a marker of poor prognosis even in the absence of overt peritoneal metastases.
Outcome of younger patients with acute diverticulitis
Authors: Hjern F , Josephson T , Altman D , Holmström B , Johansson C 
Published: April 2008

Abstract

Background
There is controversy over whether patients presenting with a primary attack of acute diverticulitis at a younger age are more prone to complications and recurrence than older patients.

Methods
A review, including postal questionnaires, was undertaken of 234 patients who had a primary episode of acute diverticulitis. The diagnosis was confirmed by computed tomography (CT) and/or pathology report. The mean length of follow-up was 30 (range 16–45) months.

Results
In 58 patients aged 50 years or less no differences in fever or white blood cell count were found in comparison with findings in 176 patients aged above 50 years. The rate of severe diverticulitis observed with CT was lower in the younger patients (2 versus 11·9 per cent; P = 0·025). Surgical management during the first admission was undertaken less commonly in younger patients (2 versus 6·8 per cent; P = 0·271). Rates of subsequent events (recurrent diverticulitis and/or further surgery) during follow-up were higher in younger patients (25 versus 19·5 per cent), but this was not significant (P = 0·423). A type II error cannot be excluded.

Conclusion
First episodes of acute diverticulitis were not more aggressive in patients aged 50 years or less. Recurrence rates were slightly higher than in older patients.
Cost-effectiveness of endarterectomy in patients with asymptomatic carotid artery stenosis
Authors: Henriksson M , Lundgren F , Carlsson P 
Published: April 2008

AbstractBackgroundLong-term health outcomes and costs are important when deciding whether a strategy of carotid endarterectomy in addition to best medical management should be recommended for patients with asymptomatic carotid artery stenosis. This study investigated the cost-effectiveness of such a strategy compared with a strategy of best medical management alone.MethodsBased on data from the randomized Asymptomatic Carotid Surgery Trial (ACST), a national vascular database and other published sources, expected costs and health outcomes in terms of quality-adjusted life years (QALYs) of both treatment strategies were estimated using decision-analytical modelling. Cost-effectiveness was established for a Swedish setting from a societal perspective.ResultsBase-case analysis showed that the incremental cost per QALY of a strategy with carotid endarterectomy for 65- and 75-year-old men (women) was €34 557 (€311 133) and €58 930 (€779 776) respectively. Sensitivity analyses indicated that the duration of the treatment effect after 5 years of follow-up in the ACST was important for the cost-effectiveness results.ConclusionCarotid endarterectomy in addition to best medical management can be considered cost-effective in men aged 73 years or less but is less likely to be cost-effective in older men or in women.
A Structure‐Controlled Investigation of Lipase Enantioselectivity by a Path‐Planning Approach
Authors: Guieysse David , Cortés Juan , Puech‐Guenot Sophie , Barbe Sophie , Lafaquière Vincent , Monsan Pierre , Siméon Thierry , André Isabelle , Remaud‐Siméon Magali 
Published: April 2008

AbstractA novel approach based on efficient path‐planning algorithms was applied to investigate the influence of substrate access on Burkholderia cepacia lipase enantioselectivity. The system studied was the transesterification of 2‐substituted racemic acid derivatives catalysed by B. cepacia lipase. In silico data provided by this approach showed a fair qualitative agreement with experimental results, and hence the potential of this computational method for fast screening of racemates. In addition, a collision detector algorithm used during the pathway searches enabled the rapid identification of amino acid residues hindering the displacement of substrates along the deep, narrow active‐site pocket of B. cepacia lipase and thus provided valuable information to guide the molecular engineering of lipase enantioselectivity.
Rapid and Efficient DNA Strand Cross‐Linking by Click Chemistry
Authors: Kočalka Petr , El‐Sagheer Afaf H. , Brown Tom 
Published: April 2008

AbstractClick chemistry has been used to covalently cross‐link complementary DNA strands between bases to form very stable duplexes. Several alkyne‐ and azide‐modified uracil monomers were used to evaluate the effect of the linkers on the efficiency of the click reaction. All cross‐linked duplexes had much higher thermal stabilities than non‐cross‐linked ones, with increases in melting temperature of up to 30 °C. In some cases, the conversion was near‐quantitative, and the reaction was complete in 5 min.
Application of MCD Spectroscopy and TD‐DFT to Nonplanar Core‐Modified Tetrabenzoporphyrins: Effect of Reduced Symmetry on Nonplanar Porphyrinoids
Authors: Mack John , Bunya Masaru , Shimizu Yusuke , Uoyama Hiroki , Komobuchi Naoki , Okujima Tetsuo , Uno Hidemitsu , Ito Satoshi , Stillman Martin J. , Ono Noboru , Kobayashi Nagao 
Published: April 2008

AbstractThe optical spectra of a series of core‐modified tetrabenzoporphyrins were analyzed to determine the effects of core modification, ligand folding, and partial benzo substitution at the ligand periphery on the electronic structure by using magnetic circular dichroism (MCD) and NMR spectroscopy, X‐ray crystallography, cyclic and differential pulse voltammetry, and TD‐DFT calculations. Planar 21‐carba‐, 21‐thia‐, 21,23‐dithia‐, and 21‐oxa‐23‐thiatetrabenzo[b,g,l,q]porphyrins reported previously were studied together with the previously unreported 21‐oxa‐ and 21‐carba‐23‐thiatetrabenzo[b,g,l,q]porphyrins. The optical properties of these compounds are compared to those of tetrabenzo[b,g,l,q]‐, 5,10,15,20‐tetraphenyl‐, 5,10,15,20‐tetraphenyltetrabenzo[b,g,l,q]‐21‐thia‐, 5,10,15,20‐tetraphenyltetrabenzodithia‐, 5,10,15,20‐tetraphenyldibenzo[g,q]‐21,23‐dithia‐, 5,10,15,20‐tetraphenyldibenzo[b,l]‐21,23‐dithia‐, 5,10,15,20‐tetraphenyltribenzo[g,q,l]‐21‐thia‐, and 5,10,15,20‐tetraphenylbenzo[b]‐21‐thiaporphyrins. Michl's perimeter model and Gouterman's four‐orbital model are used to conceptualize the results and to account for red shifts commonly observed in the spectral bands of nonplanar porphyrinoids.
Mixed‐Transition‐Metal Acetylides: Synthesis and Characterization of Complexes with up to Six Different Transition Metals Connected by Carbon‐Rich Bridging Units
Authors: Packheiser Rico , Ecorchard Petra , Rüffer Tobias , Lang Heinrich 
Published: April 2008

AbstractThe synthesis and reaction chemistry of heteromultimetallic transition‐metal complexes by linking diverse metal‐complex building blocks with multifunctional carbon‐rich alkynyl‐, benzene‐, and bipyridyl‐based bridging units is discussed. In context with this background, the preparation of [1‐{(η2‐dppf)(η5‐C5H5)RuCC}‐3‐{(tBu2bpy)(CO)3ReCC}‐5‐(PPh2)C6H3] (10) (dppf=1,1′‐bis(diphenylphosphino)ferrocene; tBu2bpy=4,4′‐di‐tert‐butyl‐2,2′‐bipyridyl; Ph=phenyl) is described; this complex can react further, leading to the successful synthesis of heterometallic complexes of higher nuclearity. Heterotetrametallic transition‐metal compounds were formed when 10 was reacted with [{(η5‐C5Me5)RhCl2}2] (18), [(Et2S)2PtCl2] (20) or [(tht)AuCC‐bpy] (24) (Me=methyl; Et=ethyl; tht=tetrahydrothiophene; bpy=2,2′‐bipyridyl‐5‐yl). Complexes [1‐{(η2‐dppf)(η5‐C5H5)RuCC}‐3‐{(tBu2bpy)(CO)3ReCC}‐5‐{PPh2RhCl2(η5‐C5Me5)}C6H3] (19), [{1‐[(η2‐dppf)(η5‐C5H5)RuCC]‐3‐[(tBu2bpy)(CO)3ReCC]‐5‐(PPh2)C6H3}2PtCl2] (21), and [1‐{(η2‐dppf)(η5‐C5H5)RuCC}‐3‐{(tBu2bpy)(CO)3ReCC}‐5‐{PPh2AuCC‐bpy}C6H3] (25) were thereby obtained in good yield. After a prolonged time in solution, complex 25 undergoes a transmetallation reaction to produce [(tBu2bpy)(CO)3ReCC‐bpy] (26). Moreover, the bipyridyl building block in 25 allowed the synthesis of Fe‐Ru‐Re‐Au‐Mo‐ (28) and Fe‐Ru‐Re‐Au‐Cu‐Ti‐based (30) assemblies on addition of [(nbd)Mo(CO)4] (27), (nbd=1,5‐norbornadiene), or [{[Ti](μ‐σ,π‐CCSiMe3)2}Cu(NCMe)][PF6] (29) ([Ti]=(η5‐C5H4SiMe3)2Ti) to 25. The identities of 5, 6, 8, 10–12, 14–16, 19, 21, 25, 26, 28, and 30 have been confirmed by elemental analysis and IR, 1H, 13C{1H}, and 31P{1H} NMR spectroscopy. From selected samples ESI‐TOF mass spectra were measured. The solid‐state structures of 8, 12, 19 and 26 were additionally solved by single‐crystal X‐ray structure analysis, confirming the structural assignment made from spectroscopy.
Functional Macromolecules from Single‐Walled Carbon Nanotubes: Synthesis and Photophysical Properties of Short Single‐Walled Carbon Nanotubes Functionalised with 9,10‐Diphenylanthracene
Authors: Aprile Carmela , Martín Roberto , Alvaro Mercedes , Scaiano Juan C. , Garcia Hermenegildo 
Published: April 2008

Abstract9,10‐Diphenylanthracene (DPA), a well‐studied organic chromophore (Φfl=0.98) that exhibits electroluminescence, has been covalently bound through 2‐(ethylthio)ethylamido linkers to the carboxylic acid groups of short, soluble single‐walled carbon nanotubes (sSWNTs) of 1 μm average length, and the resulting DPA‐functionalised sSWNT (DPA‐ sSWNT) macromolecular adducts (4.6 wt % DPA content) characterised by solution 1H NMR, Raman and IR spectroscopy and thermogravimetric analysis. Comparison of the quenching of DPA fluorescence (steady‐state and time‐resolved) and of the transient optical spectra of sSWNTs and DPA‐sSWNTs show that the covalent linkage boosts the interaction between the DPA and the sSWNT units. DPA‐sSWNTs exhibit emission in the near‐IR region from 1100–1400 nm with an enhanced quantum yield (Φ=5.7×10−3) compared with sSWNTs (Φ=3.9×10−3).
Metal‐free Uncatalyzed Reduction of α,β‐Unsaturated Ketones Mediated by Hantzsch 1,4‐Dihydropyridine
Authors: XU Hua‐Jian , LIU You‐Cheng , FU Yao 
Published: April 2008

AbstractThe selective reduction of α,β‐unsaturated ketones to ketones mediated by Hantzsch ester can be carried out by refluxing in xylene in the absence of any metallo‐ or organo‐catalyst.
A Novel Acetate Selective UV‐Vis Chemosensor Containing a Tripodal Benzaldehydic‐phenylhydrazone
Authors: QIAO Yan‐Hong , LIN Hai , SHAO Jie , LIN Hua‐Kuan 
Published: April 2008

AbstractA new colorimetric chemosensor 1 based on a tripodal benzaldehydic‐phenylhydrazone selectively sensing acetate ion has been synthesized. The highly selective binding ability of receptor 1 to acetate ion over other studied anions was demonstrated by UV‐Vis absorption spectroscopy in DMSO. Compared with other anions studied, its UV/Vis absorption spectrum in DMSO shows response towards the presence of acetate ion with high selectivity, and also color change from yellow to blue in the presence of acetate ion (2×10−5 mol·dm−3). Little UV/Vis absorption spectrum change has occurred when receptor 1 was treated with other different guest anions (F−, Cl−, Br−, I−, H2PO4− and OH−). The Kass of receptor 1 binding with acetate ion is 1.69×104.
Group Contribution Model for Estimate of Correlation Energies of Linear Alkyl Alcohols
Authors: ZHUO Shu‐Ping , SI Wei‐Jiang , WEI Ji‐Chong 
Published: April 2008

AbstractThe correlation energy contribution of a polar group in a molecular system was defined and the contributions of HO, CH3, and CH2 groups in CH3(CH2)mOH (m=0–4) linear alkyl alcohols were calculated and studied at MP2‐OPT2/6‐311++G(d) level. It is revealed that the Ecorr(HO) and Ecorr(CH3) values of two terminal groups decrease somewhat with increase of number m in CH3(CH2)mOH (m=0–4) series. The value of Ecorr(CH2) in the α position is larger than those values of methylene groups in other positions in the same system, and the farther the CH2 from HO group in the molecule, the smaller the value of Ecorr(CH2) in CH3(CH2)mOH (m=1–4) systems. Therefore, it was predicted that with the increase of number m in CH3(CH2)mOH systems the values of Ecorr(CH2) that are those of CH2 groups relatively far from the terminal HO group would show a converging trend to that of a "standard" CH2 group and its value of Ecorr(CH2) would be transferable in CH3(CH2)mOH homologous systems. The excellent fitting relationships between the total correlation energy and the number of (m−1) where m is the number of methylene groups were obtained from both results at MP2‐OPT2/6‐311++G(d) level for CH3(CH2)mOH (m= 2–4) systems by Meld program and at MP2/6‐311++G(d)//HF/6‐311++G(d) level for CH3(CH2)mOH (m=2–7) systems by Gaussian 98 program, which show that the total correlation energy is a linear function of the number of (m−1).
Interaction of Dialkyltin(IV) Bishydroxamates with 5′‐AMP or DNA:the Impact of Carbon Chain Length to Coordination Properties
Authors: SHANG Xian‐Mei , WU Ji‐Zhou , LI Qing‐Shan 
Published: April 2008

AbstractTwo diorganotin(IV) complexes, [Me2Sn(4‐FC6H4C(O)NHO)2] (1) and [Bu2Sn(4‐FC6H4C(O)NHO)2] (2), were synthesized. The action mode of the diorganotin(IV) complexes with adenosine‐5′‐monophosphate (5′‐AMP) or DNA under different conditions and different time was investigated by high‐solution 1H NMR and 31P NMR technology and UV spectroscopy. The complexes 1 and 2 which have different carbon chain lengths exhibited different action modes with mononucleotide or DNA. The interaction of 2 with 5′‐AMP resulted in significant chemical shift of H(8), H(2) and 31P. A hyperchromic effect of DNA could be observed due to the interaction of 2 with DNA, while interaction of 1 with 5′‐AMP or DNA could only cause obvious change of chemical shift of 31P. The results indicate that the complex 2 is the first case which could selectively bind to both the N(1) atom of the base and the phosphate oxygen atom of 5′‐AMP near a physiological condition, and may further destroy the helical structure of DNA, while 1 may merely bind to the phosphate oxygen atom of 5′‐AMP and cause the contraction of the DNA helical structure. The results first reveal that the organic group R may not only help the membrane transference of the diorganotin compounds but also play an important role in the action mode with DNA.
Transformation of Vesicles in Aqueous Two‐Phase System of an Anionic Gemini Surfactant and a Cationic Conventional Surfactant Mixture
Authors: JIANG Rong , HUANG Yi‐Xiong , ZHAO Jian‐Xi , HUANG Chang‐Cang 
Published: April 2008

AbstractTransformation of vesicles formed in DTAB/C11‐p‐PhCNa aqueous surfactant two‐phase (ASTP) was observed by the transmission electron microscopy (TEM). The trans‐conformation of the gemini surfactant in the aggregates was considered to be the important factor for constructing the multi‐lamellar structure of the vesicle wall. The cation‐π interaction between the quaternary ammonium cation and the aromatic ring in the spacer was determined by the UV‐Vis spectrum analysis, which, as well as the general electrostatic attraction and hydrophobic force, contributes to the stability of the multi‐lamellar structure. The concentrations of the surface‐active ions were measured for understanding the mechanism of vesicle transformation. The results show that isoelectric mixing of the two components benefits the growth of vesicles both in size and wall thickness.
Highly Dispersed Palladium Nanoparticles on Functional MWNT Surfaces for Methanol Oxidation in Alkaline Solutions
Authors: WANG Zhe , ZHU Zan‐Zan , LI You‐Xiang , LI Hu‐Lin 
Published: April 2008

AbstractPalladium nanoparticles were crystallized on 4‐aminobenzoic acid monolayer‐grafted multi‐walled carbon nanotubes (MWNT) by diazotization. The structure and nature of the resulting Pd/MWNT composite were characterized by transmission electron microscopy and X‐ray diffraction, the results show that the chemically synthesized Pd nanoparticles were homogeneously dispersed and well‐separated from one another on the modified MWNT surfaces. Cyclic voltammogram showed that the Pd‐MWNT composite materials performed higher electrocatalytic activity and better long‐term stability toward methanol oxidation in alkaline solution than Pd‐C. The results imply that the Pd‐MWNT composite materials as a promising support material improve the excellent electrocatalytic activity for methanol oxidation greatly. So the Pd/MWNT composites have a good application potential to fuel cells.
Synthesis and Electrochromic Properties of Poly(3‐hexyl‐thio‐ phene) in a Room Temperature Ionic Liquid and Its Application to an Electrochromic Device
Authors: LI Xiao‐Yu , PANG Yue‐Hong , SHI Guo‐Yue , ZHU, Jun‐Ru Jun‐Ru , WANG Fei , JIN Li‐Tong 
Published: April 2008

AbstractElectrochemical polymerization in a room temperature ionic liquid, 1‐butyl‐3‐methylimidazolium hexafluorophosphate ([BMIM]PF6), was used to prepare electrochromic poly(3‐hexylthiophene) (PHexT). Characterization of the resulting polymer was performed by cyclic voltammetry and scanning electron microscopy analyses. Spectroelectrochemistry and electrochromic properties were also characterized using various experimental techniques in the same pure ionic liquid. The thin film of PHexT was orange red in its fully reduced state. After oxidization of the undoped polymer, the film underwent a reversible change to the blue form. The PHexT film exhibited high chromatic contrast (40%), comparative switching time (2.5 s) and great electrochromic efficiency (230 cm2/C). A PHexT‐based electrochromic device was constructed and its electrochromic properties were also investigated in this paper.
Vibrational Spectroscopic Study on Ion Solvation and Ion Association of Lithium Tetrafluoroborate in 4‐Ethoxymethyl‐ethylene Carbonate
Authors: QIAO Hong‐Wei , LUAN He‐Lin , ZHOU Zhi‐Ming , FANG Xiang‐Peng , YAO Wen , WANG Xin , LI Ji‐Mei 
Published: April 2008

AbstractSolvation and association interactions in solutions of lithium tetrafluoroborate/4‐ethoxymethyl‐ethylene carbonate (EEC) have been studied as a function of concentration of lithium tetrafluoroborate by infrared and Raman spectroscopy. Strong interactions between Li+ and solvent molecules or BF4− anions were observed. Splitting of the ring symmetric angle deformation band, the carbonyl stretching band and the skeletal ring vibrational band suggests that the interaction between Li+ ions and EEC molecules take place via the oxygen atom on the carbonyl group. The apparent solvation numbers of Li+, varying from 4.32 to 1.26 with increasing the solution concentrations, were deduced. Band‐fitting to the B–F stretching band of BF4− anion permits detailed assess of ion pairing. The spectroscopically free BF4− anion, contact ion pair and contact ion dimmers coexist in concentrated solutions.
Asymmetric Synthesis of 2‐Methoxy‐2‐methylchroman‐7‐ol in Solid‐state β ‐Cyclodextrin Complexes
Authors: TAN Ni , PAN Jia‐Hui , WANG San‐Yong , XU Fang , TAO Yi‐Wen , SHE Zhi‐Gang , LIN Yong‐Cheng 
Published: April 2008

AbstractA chiral product, (+)‐2‐methoxy‐2‐methylchroman‐7‐ol, was obtained from β‐cyclodextrin (β‐CD)/1,3‐dihydroxylbenzene (complex A) and methyl vinyl ketone/β‐cyclodextrin (complex B). The reaction was carried out at room temperature in a solid state to give the desired product in 82.8% yield and 78.4% ee. Low optically active product (19.5% ee) was obtained from complex B and 1,3‐dihydroxylbenzene (A), and non‐optically active product was obtained from complex A and methyl vinyl ketone (B) under the same conditions. The structures of the inclusion compounds were elucidated by melting points, X‐ray diffraction, solid‐state 13C CP/MAS NMR (100 MHz, spin5000), and ROESY analyses. The ratios (1:1) of host‐guest in the inclusion compounds were decided by 1H NMR spectra (400 MHz). The mechanism of the solid‐state conjugated cyclic addition reaction was also discussed.