Azzindani/Open_Reaction_Data huggingface dataset:
Reaction SMILES: [OH:1][C:2]1[CH:10]=[CH:9][C:8]([C:11]2[N:12]([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[C:13]3[C:18]([CH:19]=2)=[CH:17][C:16]([CH2:20][N:21]2[CH2:26][CH2:25][CH2:24][CH2:23][CH2:22]2)=[CH:15][CH:14]=3)=[C:7]2[C:3]=1[CH2:4][NH:5][C:6]2=[O:34].C(N(CC)CC)C.[C:42]([C:46]1[CH:51]=[CH:50][C:49]([S:52](Cl)(=[O:54])=[O:53])=[CH:48][CH:47]=1)([CH3:45])([CH3:44])[CH3:43]>C(#N)C>[C:42]([C:46]1[CH:51]=[CH:50][C:49]([S:52]([O:1][C:2]2[CH:10]=[CH:9][C:8]([C:11]3[N:12]([C:27]([O:29][C:30]([CH3:31])([CH3:33])[CH3:32])=[O:28])[C:13]4[C:18]([CH:19]=3)=[CH:17][C:16]([CH2:20][N:21]3[CH2:26][CH2:25][CH2:24][CH2:23][CH2:22]3)=[CH:15][CH:14]=4)=[C:7]3[C:3]=2[CH2:4][NH:5][C:6]3=[O:34])(=[O:54])=[O:53])=[CH:48][CH:47]=1)([CH3:45])([CH3:43])[CH3:44]
Reactant: CC(C)(C)OC(=O)n1c(-c2ccc(O)c3c2C(=O)NC3)cc2cc(CN3CCCCC3)ccc21
Reactant: CC(C)(C)c1ccc(S(=O)(=O)Cl)cc1
Solvent: CCN(CC)CC
Solvent: CC#N
Product: CC(C)(C)OC(=O)n1c(-c2ccc(OS(=O)(=O)c3ccc(C(C)(C)C)cc3)c3c2C(=O)NC3)cc2cc(CN3CCCCC3)ccc21
Yield: 43 %

Procedure:
In a similar manner to Step 1 of Example 233, 4-hydroxy-7-[1-(tert-butoxycarbonyl)-5-(piperidinomethyl)indol-2-yl]isoindolinone (0.0294 g, 0.0637 mmol) was dissolved in acetonitrile (0.650 mL), and the solution was treated with triethylamine (0.0530 mL, 0.382 mmol) and 4-tert-butylbenzenesulfonyl chloride (0.0440 g, 0.191 mmol) to obtain 4-(4-tert-butylbenzenesulfonyloxy)-7-[1-(tert-butoxycarbonyl)-5-(piperidinomethyl)indol-2-yl]isoindolinone (0.0180 g, yield 43%).
Reaction SMILES: [C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([OH:14])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[F:15][C:16]([F:28])([F:27])[C:17]1[CH:22]=[C:21]([N+:23]([O-:25])=[O:24])[CH:20]=[CH:19][C:18]=1O.FC(F)(F)C1C=C([N+]([O-])=O)C=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>ClCCl>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([O:14][C:18]2[CH:19]=[CH:20][C:21]([N+:23]([O-:25])=[O:24])=[CH:22][C:17]=2[C:16]([F:15])([F:27])[F:28])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]
Reactant: O=[N+]([O-])c1ccc(O)c(C(F)(F)F)c1
Reactant: CC(C)(C)OC(=O)N1CCC(O)CC1
Agent: CCOC(=O)N=NC(=O)OCC
Agent: O=[N+]([O-])c1cccc(C(F)(F)F)c1
Agent: c1ccc(P(c2ccccc2)c2ccccc2)cc1
Solvent: ClCCl
Product: CC(C)(C)OC(=O)N1CCC(Oc2ccc([N+](=O)[O-])cc2C(F)(F)F)CC1
Temperature: 25 °C
Reaction time: 24 h
Yield: 87.7 %

Procedure:
To a solution of 1-t-butoxycarbonyl-4-hydroxypiperidine (1.45 g), 2-trifluoromethyl-4-nitrophenol (1.38 g) [which was prepared from 3-trifluoromethylnitrobenzene according to the method described in J. Org. Chem., 63 4199 (1998)] and triphenylphosphine (2.27 g) in dichloromethane (65 ml) was added dropwise diethyl azodicarboxylate (1.4 ml) in an ice bath and the mixture was stirred at room temperature for 24 hours. The reaction mixture was concentrated in vacuo. The residue was purified by chromatography on a silica gel column using dichloromethane as an eluant to give the desired compound (2.28 g, yield 88%) as a pale yellow oil.
Reaction SMILES: [CH3:1][O:2][C:3]1[CH:12]=[C:11]2[C:6]([C:7]([O:13][C:14]3[CH:19]=[CH:18][C:17]([NH:20][C:21]([C:23]4[C:24](=[O:54])[N:25]([C:48]5[CH:53]=[CH:52][CH:51]=[CH:50][CH:49]=5)[N:26]([CH2:29][C@H:30]([O:32][C:33](=[O:47])[CH2:34][N:35](C(OCC5C=CC=CC=5)=O)[CH3:36])[CH3:31])[C:27]=4[CH3:28])=[O:22])=[CH:16][C:15]=3[F:55])=[CH:8][CH:9]=[N:10]2)=[CH:5][CH:4]=1>CCOC(C)=O.CO.[Pd]>[CH3:36][NH:35][CH2:34][C:33]([O:32][C@H:30]([CH3:31])[CH2:29][N:26]1[C:27]([CH3:28])=[C:23]([C:21](=[O:22])[NH:20][C:17]2[CH:18]=[CH:19][C:14]([O:13][C:7]3[C:6]4[C:11](=[CH:12][C:3]([O:2][CH3:1])=[CH:4][CH:5]=4)[N:10]=[CH:9][CH:8]=3)=[C:15]([F:55])[CH:16]=2)[C:24](=[O:54])[N:25]1[C:48]1[CH:49]=[CH:50][CH:51]=[CH:52][CH:53]=1)=[O:47]
Reactant: COc1ccc2c(Oc3ccc(NC(=O)c4c(C)n(C[C@@H](C)OC(=O)CN(C)C(=O)OCc5ccccc5)n(-c5ccccc5)c4=O)cc3F)ccnc2c1
Agent: [Pd]
Solvent: CO
Solvent: CCOC(C)=O
Product: CNCC(=O)O[C@H](C)Cn1c(C)c(C(=O)Nc2ccc(Oc3ccnc4cc(OC)ccc34)c(F)c2)c(=O)n1-c1ccccc1
Temperature: 25 °C
Reaction time: 1 h

Procedure:
To a solution of (R)-1-(4-(4-(7-methoxyquinolin-4-yloxy)-3-fluorophenylcarbamoyl)-2,3-dihydro-5-methyl-3-oxo-2-phenylpyrazol-1-yl)propan-2-yl-2-(N-benzyloxycarbo-nyl-N-methylamino)acetate (1.404 g, 1.876 mmol) in a mixture of EtOAc (100 mL) and MeOH (100 mL) was added catalytic amount of Pd/C (10%, ˜55% w/w water content, 100 mg) under N2 atmosphere. The suspension was degassed under vacuum and then purged with H2. The reaction mixture was stirred at rt for 1 h under H2 balloon. The mixture was filtered and the residue was washed with MeOH (50 mL×3). The filtrate used for the next step immediately.
Reaction SMILES: [O-2:1].[Zn+2:2].C(=O)([O-])[O-:4].[Li+:7].[Li+:8].[O-2].[V+5:10].[O-2].[O-2].[O-2].[O-2].[V+5]>>[O-2:4].[Zn+2:2].[O:1]([Li:8])[Li:7].[O-2:4].[V+5:10].[O-2:4].[O-2:4].[O-2:4].[O-2:4].[V+5:10]
Reactant: [Li+]
Reactant: O=C([O-])[O-]
Agent: [V+5]
Agent: [O-2]
Agent: [Zn+2]
Product: [Li]O[Li]

Procedure:
The humidity-sensitive element in accordance with the present invention is produced in the following manner. First, fine powders of chromic oxide (Cr2O3), zinc oxide (Cr2O3), cupric oxide (CuO), lithium carbonate (Li2CO3) and vanadium oxide (V2O5) are used as starting materials. The starting materials were weighed so as to give Cr2O3, ZnO, CuO, Li2O, V2O5 mol ratios of 45%, 45%, 4%, 3% and 3%, respectively. The materials are then wet-mixed for 24 hours in a ball mill. After wet-mixing, the mixture is dried for 12 hours at 120° C. and then calcined at 800° C. The calcined material is pulverized for 24 hours in a ball mill and is dried again for 12 hours at 120° C. to form a powder. Next, 2 wt.% of polyvinyl alcohol is added to the powder as a binder. The mixture is then granulated in a granulating machine. The granulated material is then formed under 500 kg/cm2 of pressure into a disc with a diameter of approximately 8 mm and a thickness of approximately 2 mm to form the body of the element. The disc is then sintered for 2 hours at a temperature of 1300° C. A ruthenium oxide paste is then screen-printed in a lattice-shaped configuration on each surface of the body to form the electrodes. The body is then heated to approximately 700° C. Thus a humidity-sensitive element is formed in accordance with the present invention.
Reaction SMILES: [CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([C:9]2[C:17]3[C:12](=[CH:13][C:14]([C:18]4[CH:23]=[CH:22][CH:21]=[C:20]([N+:24]([O-])=O)[CH:19]=4)=[CH:15][CH:16]=3)[N:11]([C:27]3[N:32]=[CH:31][N:30]=[C:29]([NH:33][CH3:34])[CH:28]=3)[CH:10]=2)=[CH:5][CH:4]=1>[Ni].CO.CN(C=O)C>[NH2:24][C:20]1[CH:19]=[C:18]([C:14]2[CH:13]=[C:12]3[C:17]([C:9]([C:6]4[CH:5]=[CH:4][C:3]([O:2][CH3:1])=[CH:8][CH:7]=4)=[CH:10][N:11]3[C:27]3[N:32]=[CH:31][N:30]=[C:29]([NH:33][CH3:34])[CH:28]=3)=[CH:16][CH:15]=2)[CH:23]=[CH:22][CH:21]=1
Reactant: CNc1cc(-n2cc(-c3ccc(OC)cc3)c3ccc(-c4cccc([N+](=O)[O-])c4)cc32)ncn1
Agent: [Ni]
Solvent: CN(C)C=O
Solvent: CO
Product: CNc1cc(-n2cc(-c3ccc(OC)cc3)c3ccc(-c4cccc(N)c4)cc32)ncn1
Temperature: 25 °C
Reaction time: 24 h

Procedure:
Methanol/DMF (1:1, 20 mL) was added to 6-(3-(4-methoxyphenyl)-6-(3-nitrophenyl)-1H-indol-1-yl)-N-methylpyrimidin-4-amine (100 mg, 0.22 mmol) and Raney nickel (about 50 mg). The mixture was stirred at room temperature for 24 hours under hydrogen gas (1 atm). The reaction solution was filtered using a diatomite pad and then concentrated under reduced pressure. The target compound was obtained as brown solid.
Reaction SMILES: [NH2:1][C@@H:2]1[CH2:7][CH2:6][CH2:5][CH2:4][C@H:3]1[CH2:8][C:9]1[CH:14]=[CH:13][C:12]([N:15]2[S:19](=[O:21])(=[O:20])[N:18](CC[Si](C)(C)C)[C:17](=[O:28])[CH2:16]2)=[C:11]([O:29]CC2C=CC=CC=2)[CH:10]=1.[C:37]1([S:43](Cl)(=[O:45])=[O:44])[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=1>>[OH:29][C:11]1[CH:10]=[C:9]([CH:14]=[CH:13][C:12]=1[N:15]1[CH2:16][C:17](=[O:28])[NH:18][S:19]1(=[O:21])=[O:20])[CH2:8][C@@H:3]1[CH2:4][CH2:5][CH2:6][CH2:7][C@H:2]1[NH:1][S:43]([C:37]1[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=1)(=[O:45])=[O:44]
Reactant: O=S(=O)(Cl)c1ccccc1
Reactant: C[Si](C)(C)CCN1C(=O)CN(c2ccc(C[C@@H]3CCCC[C@H]3N)cc2OCc2ccccc2)S1(=O)=O
Product: O=C1CN(c2ccc(C[C@@H]3CCCC[C@H]3NS(=O)(=O)c3ccccc3)cc2O)S(=O)(=O)N1

Procedure:
The title compound is prepared from 5-[4-((1S*,2R*)-2-aminocyclohexylmethyl)-2-benzyloxy-phenyl]-1,1-dioxo-2-(2-trimethylsilanylethyl)-1,2,5-thiadiazolidin-3-one and benzenesulfonyl chloride analogous to Example 205, steps B, C and D. MS (M−1)−=478; HPLC retention time=1.10 min. (Method A).
Reaction SMILES: Cl.[CH2:2]([NH2:4])[CH3:3].[S:5]1[CH:9]=[CH:8][CH:7]=[C:6]1[CH:10]=O.C(N(CC)CC)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>CO>[S:5]1[CH:9]=[CH:8][CH:7]=[C:6]1[CH2:10][NH:4][CH2:2][CH3:3]
Reactant: CCN
Reactant: O=Cc1cccs1
Agent: CC(=O)O[BH-](OC(C)=O)OC(C)=O
Agent: Cl
Agent: [Na+]
Solvent: CO
Solvent: CCN(CC)CC
Product: CCNCc1cccs1
Temperature: 0 °C
Reaction time: 0.5 h
Yield: 77.4 %

Procedure:
To a 0° C. chilled round bottom flask was added ethyl amine hydrochloride (4.58 g, 56.17 mmol) and thiophene-2-carbaldehyde (5.0 mL, 53.50 mmol) in methanol (20.0 mL), followed by triethylamine (7.83 mL, 56.17 mmol) and the reaction was stirred for 30 minutes. Sodiumtriacetoxyborohydride (15.87 g, 74.90 mmol) was added in one portion under vigorous stirring. The ice bath was removed and the flask was attached to a bubbler to allow gas evolution and expansion. The reaction was stirred overnight at room temp. Most of the volatiles were evaporated in vacuo. The reaction mixture was quenched by adding 1 N NaOH, and the product was extracted with dichloromethane. The organic extract was washed with brine and dried over MgSO4. The volatiles were evaporated to give the crude free base N-(thiophen-2-ylmethyl)ethanamine (5.85 g, 41.42 mmol, 77%), which resulted of a purity grade >97% by 1H-NMR analysis, therefore it was used in the next step without any further purification. 1H NMR (400 MHz, CDCl3) δ 1.13 (t, J=7.1 Hz, 3H), 2.71 (q, J=7.2 Hz, 2H), 4.00 (d, J=0.7 Hz, 2H), 6.90-6.97 (m, 2H), 7.21 (dd, J=5.0, 1.3 Hz, 1H).
Reaction SMILES: [Cl:1][C:2]1[CH:10]=[CH:9][C:8]([S:11](Cl)(=[O:13])=[O:12])=[C:7]([Cl:15])[C:3]=1[C:4]([OH:6])=[O:5].[NH:16]1[CH2:21][CH2:20][CH2:19][CH2:18][CH2:17]1>C(Cl)Cl>[Cl:1][C:2]1[CH:10]=[CH:9][C:8]([S:11]([N:16]2[CH2:21][CH2:20][CH2:19][CH2:18][CH2:17]2)(=[O:13])=[O:12])=[C:7]([Cl:15])[C:3]=1[C:4]([OH:6])=[O:5]
Reactant: C1CCNCC1
Reactant: O=C(O)c1c(Cl)ccc(S(=O)(=O)Cl)c1Cl
Solvent: ClCCl
Product: O=C(O)c1c(Cl)ccc(S(=O)(=O)N2CCCCC2)c1Cl

Procedure:
2,6-Dichloro-5-chlorosulfonylbenzoic acid (960 mg.; 3.3 m moles) is added portion-wise to 1.95 g. (0.0165 mole) of piperidine in 15 ml. of dry methylene chloride, and the mixture heated to reflux for 1.5 hrs. Th solvent and excess amine are removed under reduced pressure and the residue dissolved in 15 ml. of 2N sodium hydroxide. The aqueous base solution is extracted (2 × 50 ml.) with ether and acidified with 6N hydrochloric acid. The precipitated gum is filtered, dried and allowed to crystallize in hexane, 1.1 g., m.p. 145°-150° C. A small sample is recrystallized from acetonitrile, m.p. 142°-145° C.
Reaction SMILES: [NH2:1][C:2]1[C:21]([C:22]2[CH:27]=[C:26]([C:28](=[O:39])[NH:29][C:30]3([C:33]4[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=4)[CH2:32][CH2:31]3)[CH:25]=[CH:24][C:23]=2[F:40])=[CH:20][C:5]2[C:6]([C:16]([NH:18][CH3:19])=[O:17])=[C:7]([C:9]3[CH:14]=[CH:13][C:12]([F:15])=[CH:11][CH:10]=3)[O:8][C:4]=2[CH:3]=1.[CH3:41][S:42](Cl)(=[O:44])=[O:43].CS(NS(C)(=O)=O)(=O)=O>>[F:40][C:23]1[CH:24]=[CH:25][C:26]([C:28](=[O:39])[NH:29][C:30]2([C:33]3[CH:34]=[CH:35][CH:36]=[CH:37][CH:38]=3)[CH2:31][CH2:32]2)=[CH:27][C:22]=1[C:21]1[C:2]([NH:1][S:42]([CH3:41])(=[O:44])=[O:43])=[CH:3][C:4]2[O:8][C:7]([C:9]3[CH:14]=[CH:13][C:12]([F:15])=[CH:11][CH:10]=3)=[C:6]([C:16]([NH:18][CH3:19])=[O:17])[C:5]=2[CH:20]=1
Reactant: CS(=O)(=O)Cl
Reactant: CNC(=O)c1c(-c2ccc(F)cc2)oc2cc(N)c(-c3cc(C(=O)NC4(c5ccccc5)CC4)ccc3F)cc12
Agent: CS(=O)(=O)NS(C)(=O)=O
Product: CNC(=O)c1c(-c2ccc(F)cc2)oc2cc(NS(C)(=O)=O)c(-c3cc(C(=O)NC4(c5ccccc5)CC4)ccc3F)cc12

Procedure:
Prepared from the coupling between 6-Amino-5-(2-fluoro-5-(1-phenylcyclopropylcarbamoyl)phenyl)-2-(4-fluorophenyl)-N-methylbenzofuran-3-carboxamide and methanesulfonyl chloride (N,N-diisopropylethylamine, C1CH2CH2Cl, r.t.), followed by hydrolysis of the intermediate N-(methylsulfonyl)methanesulfonamide (Cs2CO3, 1:5 H2O/1,4-dioxane, 90° C.). Purification by Shimadzu-VP preparative reverse phase HPLC using the separation method: Solvent A=10% MeOH-90% H2O-0.1% TFA, Solvent B=90% MeOH-10% H2O-0.1% TFA, Start % B=50, Final % B=100, Gradient time=10 min, Stop time=12 min, Flow Rate=25 mL/min, Column: Waters-Sunfire 19×100 mm S5, Fraction Collection: 6.70-7.25 min. (UV detection at 220 nm). 1H NMR (500 MHz, CD3OD) δ 8.00-7.95 (overlapping m, 4H), 7.83 (s, 1H), 7.66 (s, 1H), 7.35 (t, J=9.00, 1H), 7.30-7.27 (overlapping m, 6H), 7.18 (m, 1H), 2.94 (s, 3H), 2.88 (s, 3H), 1.37-1.35 (appeared as d, 4H). LC/MS were performed by using Shimadzu-VP instrument with UV detection at 220 nm and Waters Micromass. HPLC method: Solvent A=10% MeOH-90% H2O-0.1% TFA, Solvent B=90% MeOH-10% H2O-0.1% TFA, Start % B=0, Final % B=100, Gradient time=2 min, Stop time=3 min, Flow Rate=4 ml/min, Column: Xterra MS 7 um, C18, 3.0×50 mm; (ES+) m/z (M+H)+=616.48, HPLC Rt=1.563 min. Analytical HPLC were performed by using Shimadzu-VP instrument with UV detection at 220 nm and 254 nm. Analytical HPLC method: Solvent A=5% MeCN-95% H2O-0.1% TFA, Solvent B=95% MeCN-5% H2O-0.1% TFA, Start % B=50, Final % B=100, Gradient time=15 min, Stop time=18 min, Flow Rate=1 ml/min, Column: Sunfire C18, 3.5 um, 4.6×150 mm, Rt=6.57 min; Column: Xbridge Phenyl 3.5 um, 4.6×150 mm, Rt=5.80 min.
Reaction SMILES: [NH2:1][C:2]1[CH:10]=[C:9]([N+:11]([O-:13])=[O:12])[CH:8]=[CH:7][C:3]=1[C:4]([OH:6])=O.[CH:14]([NH2:16])=O.C([O-])(O)=O.[Na+]>>[N+:11]([C:9]1[CH:10]=[C:2]2[C:3]([C:4](=[O:6])[NH:16][CH:14]=[N:1]2)=[CH:7][CH:8]=1)([O-:13])=[O:12]
Reactant: NC=O
Reactant: Nc1cc([N+](=O)[O-])ccc1C(=O)O
Agent: O=C([O-])O
Agent: [Na+]
Product: O=c1[nH]cnc2cc([N+](=O)[O-])ccc12
Temperature: 150 °C
Yield: 70.4 %

Procedure:
A mixture of 2-amino-4-nitrobenzoic acid (5.0 g, 27.5 mmol) and formamide (8.0 ml, 201.5 mmol) in a microwave reaction vessel was heated in a microwave reactor at 150° C. for 1 hr. The slurry was cooled to rt, stirred with aq. NaHCO3, filtered, washed with water followed by ether and dried in vacuum oven to provide 3.7 g of 7-nitroquinazolin-4(3H)-one (compound 98-1).
Reaction SMILES: Cl.[Cl:2][C:3]1[CH:12]=[C:11]2[C:6]([C:7]([NH:13][C:14]3[CH:19]=[CH:18][C:17]([S:20](Cl)(=[O:22])=[O:21])=[CH:16][CH:15]=3)=[CH:8][CH:9]=[N:10]2)=[CH:5][CH:4]=1.C(=O)([O-])[O-].[Na+].[Na+].[NH2:30][CH2:31][CH:32]1[CH2:36][CH2:35][CH2:34][N:33]1[CH2:37][CH2:38][CH3:39]>C(Cl)(Cl)Cl.O>[Cl:2][C:3]1[CH:12]=[C:11]2[C:6]([C:7]([NH:13][C:14]3[CH:19]=[CH:18][C:17]([S:20]([NH:30][CH2:31][CH:32]4[CH2:36][CH2:35][CH2:34][N:33]4[CH2:37][CH2:38][CH3:39])(=[O:22])=[O:21])=[CH:16][CH:15]=3)=[CH:8][CH:9]=[N:10]2)=[CH:5][CH:4]=1
Reactant: CCCN1CCCC1CN
Reactant: O=S(=O)(Cl)c1ccc(Nc2ccnc3cc(Cl)ccc23)cc1
Agent: Cl
Agent: O=C([O-])[O-]
Agent: [Na+]
Solvent: O
Solvent: ClC(Cl)Cl
Product: CCCN1CCCC1CNS(=O)(=O)c1ccc(Nc2ccnc3cc(Cl)ccc23)cc1
Temperature: 25 °C
Yield: 28 %

Procedure:
4-(7-Chloro-4-quinolinylamino)benzenesulphonyl chloride hydrochloride (5.4 g, 0.014 mol) was added portionwise to a well-stirred two phase mixture of chloroform/water (140 ml/140 ml) containing sodium carbonate (14.8 g) and 2-aminomethyl-1-propylpyrrolidine (2.0 g, 0.014 mol) at about 10° C. The mixture was allowed to warm to room temperature, then stirred for 11/2 hours. The chloroform layer was separated, dried (MgSO4) and evaporated under reduced pressure to give a gum. The gum was crystallised from ethanol/water to give a pale yellow solid (1.8 g). A further recrystallisation from ethanol gave the title compound (0.5 g), melting point 192.5°-194° C.
Reaction SMILES: [C:1]([O:5][C:6]([NH:8][CH2:9][CH2:10][CH2:11][CH2:12][C:13]([OH:15])=O)=[O:7])([CH3:4])([CH3:3])[CH3:2].[NH:16]1[CH2:21][CH2:20][O:19][CH2:18][CH2:17]1.Cl.C(N=C=NCCCN(C)C)C>C(Cl)Cl>[C:1]([O:5][C:6]([NH:8][CH2:9][CH2:10][CH2:11][CH2:12][C:13]([N:16]1[CH2:21][CH2:20][O:19][CH2:18][CH2:17]1)=[O:15])=[O:7])([CH3:2])([CH3:3])[CH3:4]
Reactant: CC(C)(C)OC(=O)NCCCCC(=O)O
Reactant: C1COCCN1
Agent: CCN=C=NCCCN(C)C
Agent: Cl
Solvent: ClCCl
Product: CC(C)(C)OC(=O)NCCCCC(=O)N1CCOCC1
Reaction time: 3 h
Yield: 58.2 %

Procedure:
To a mixture of 5-(N-t-butoxycarbonylamino)valeric acid (2.173 g) and morpholine (1.045 g) in anhydrous methylene chloride (22 ml) was added N-ethyl-N'-(3-dimethylaminopropyl)carbodiimide hydrochloride (2.30 g) portionwise at 0°-5° C. After being stirred for 3 hours at the same temperature, the solvent was evaporated in vacuo and the residue was dissolved in ethyl acetate (100 ml) and water (100 ml). The organic layer was washed with 0.5N hydrochloric acid (100 ml), water (100 ml), aqueous sodium bicarbonate (100 ml), water (100 ml) and brine (100 ml) successively, and dried over magnesium sulfate. Evaporation of the solvent gave 4-[5-(N-t-butoxycarbonylamino)valeryl]morpholine (1.668 g) as an oil.
Reaction SMILES: Cl[C:2]([F:7])([F:6])[C:3]([O-])=O.[Na+].[CH:9]1[C:19]2[CH:18]=C[C:16]3[CH:20]=[CH:21][CH:22]=[CH:23][C:15]=3[C:14](=[O:24])[C:13]=2[CH:12]=[CH:11][CH:10]=1.O>COCCOCCOC>[F:6][C:2]1([F:7])[CH:18]2[CH:3]1[C:23]1[CH:22]=[CH:21][CH:20]=[CH:16][C:15]=1[C:14](=[O:24])[C:13]1[CH:12]=[CH:11][CH:10]=[CH:9][C:19]=12
Reactant: O=c1c2ccccc2ccc2ccccc12
Reactant: O=C([O-])C(F)(F)Cl
Agent: [Na+]
Solvent: COCCOCCOC
Solvent: O
Product: O=C1c2ccccc2C2C(c3ccccc31)C2(F)F
Yield: 45.1 %

Procedure:
A solution of sodium chlorodifluoroacetate (350 g) in diglyme (1400 mL) was added dropwise over 4 to 8 hours, preferably over 6 hours, to a solution of 5H-dibenzo[a,d]cyclo-hepten-5-one (25 g) in diglyme (500 mL), with stirring, and under nitrogen, maintaining the reaction temperature at 160°-165° C. The cooled reaction mixture was poured into water (1.8 L) and extracted with ether (1.8 L). The organic phase was washed with water, dried over sodium sulfate (Na2SO4), and evaporated. The residue was recrystallized from ethanol, then from acetone/hexane to give 14 g of 1,1-difluoro-1a,10b-dihydrodibenzo[a,e]cyclopropa[c]-cyclohepten-6(1H)-one.
Reaction SMILES: [OH:1][N:2]1[C:6](=[O:7])[C:5]2=[CH:8][CH:9]=[CH:10][CH:11]=[C:4]2[C:3]1=[O:12].[CH2:13]1[CH2:23]CN2C(=NCCC2)C[CH2:14]1.C(Br)C=C>CN(C=O)C>[CH2:23]([O:1][N:2]1[C:3](=[O:12])[C:4]2=[CH:11][CH:10]=[CH:9][CH:8]=[C:5]2[C:6]1=[O:7])[CH:13]=[CH2:14]
Reactant: C1CCC2=NCCCN2CC1
Reactant: O=C1c2ccccc2C(=O)N1O
Solvent: CN(C)C=O
Solvent: C=CCBr
Product: C=CCON1C(=O)c2ccccc2C1=O
Reaction time: 0.17 h
Yield: 93.4 %

Procedure:
To a cooled solution (5 to 10° C.) of N-hydroxyphthalimide (53.80 g, 0.33 mol) in DMF (120 mL), was added DBU (46.36 mL, 0.31 mol) was added in one portion, with stirring. After 10 minutes, allyl bromide (25.96 mL, 0.30 mol) was added in portions. The cooling bath was removed and the reaction mixture was stirred at room temperature for 1 hour, until the color turned from dark burgundy to yellow. Ethyl acetate (300 mL) and water (150 mL) were added, the aqueous phase was separated, and the organic phase was washed with water (4×50 mL). The combined aqueous extracts were back-extracted with EtOAc (3×50 mL) and the total EtOAc solution was washed with saturated NaHCO3 (10×50 mL) until the aqueous phase was pale yellow, then with brine (2×75 mL) and dried over anhydrous MgSO4. Removal of the solvent afforded 58.83 g (96% yield) of the product as a white solid.
Reaction SMILES: [CH3:1][CH:2]1[CH:27]2[O:28][C:26]2([CH3:29])[CH:25]([OH:30])[CH2:24][C:22](=[O:23])[N:21]([CH3:31])[C:14]2=[C:15]([Cl:20])[C:16]([O:18][CH3:19])=[CH:17][C:12](=[CH:13]2)[CH2:11][C:10]([CH3:32])=[CH:9][CH:8]=[CH:7][CH:6]([O:33][CH3:34])[C:5]2([OH:39])[NH:35][C:36]([O:38][CH:3]1[CH2:4]2)=[O:37].[CH:40]1([C:44]([OH:46])=[O:45])[CH2:43][CH2:42][CH2:41]1.O>ClCCl.CN(C)C1C=CN=CC=1>[CH3:1][CH:2]1[CH:27]2[O:28][C:26]2([CH3:29])[CH:25]([OH:30])[CH2:24][C:22](=[O:23])[N:21]([CH3:31])[C:14]2=[C:15]([Cl:20])[C:16]([O:18][CH3:19])=[CH:17][C:12](=[CH:13]2)[CH2:11][C:10]([CH3:32])=[CH:9][CH:8]=[CH:7][CH:6]([O:33][CH3:34])[C:5]2([OH:39])[NH:35][C:36]([O:38][CH:3]1[CH2:4]2)=[O:37].[CH2:42]1[CH2:43][CH:40]([C:44]([O-:46])=[O:45])[CH2:41]1
Reactant: O=C(O)C1CCC1
Agent: CN(C)c1ccncc1
Agent: COc1cc2cc(c1Cl)N(C)C(=O)CC(O)C1(C)OC1C(C)C1CC(O)(NC(=O)O1)C(OC)/C=C/C=C(\C)C2
Agent: COc1cc2cc(c1Cl)N(C)C(=O)CC(O)C1(C)OC1C(C)C1CC(O)(NC(=O)O1)C(OC)C=CC=C(C)C2
Solvent: ClCCl
Solvent: O
Product: O=C([O-])C1CCC1
Temperature: 25 °C
Reaction time: 4 h

Procedure:
Maytansinol (127.7 mg) and cyclobutanecarboxylic acid (120 μl) was dissolved in 5 ml of dichloromethane. To the solution, were added 340 mg of N,N-dicyclohexylcarbodiimide and 55 mg of 4-dimethylaminopyridine. The mixture was stirred at room temperature for four hours. To the reaction solution was added water, and the mixture was stirred. The resulting precipitates were removed by filtration and the filtrate was diluted with ethyl acetate. The ethyl acetate layer was separated and washed with water and dried. The solvent was removed by evaporation and the residue was purified by means of a silica-gel chromatography (solvent: aqueous ethyl acetate) to collect 82.7 g of a fraction containing the desired product. The product was crystallized from a small volume of ethyl acetate to yield 47.6 mg of maytansinol 3-cyclobutanecarboxylate. Melting point: 205°-208° C. (decomp.).
Reaction SMILES: [C:1]([O-:6])(=[O:5])[C:2]([CH3:4])=[CH2:3].[K+].C1C=CC(NC2C=CC(NC3C=CC=CC=3)=CC=2)=CC=1.Cl[CH2:29][CH2:30][CH2:31][Si:32]([O:37][CH3:38])([O:35][CH3:36])[O:33][CH3:34]>CN(C)C1C=CN=CC=1>[C:1]([O:6][CH2:29][CH2:30][CH2:31][Si:32]([O:37][CH3:38])([O:35][CH3:36])[O:33][CH3:34])(=[O:5])[C:2]([CH3:4])=[CH2:3]
Reactant: CO[Si](CCCCl)(OC)OC
Reactant: C=C(C)C(=O)[O-]
Agent: CN(C)c1ccncc1
Agent: [K+]
Agent: c1ccc(Nc2ccc(Nc3ccccc3)cc2)cc1
Product: C=C(C)C(=O)OCCC[Si](OC)(OC)OC
Temperature: 135 °C
Yield: 92 %

Procedure:
1.74 g (0.015 mol) of 4-dimethylaminopyridine were dissolved in 201.5 (1.015 mol) of 3-chloropropyltrimethoxysilane, and the solution was heated to 135° C. while stirring, and was maintained at this temperature for 15 minutes. After the solution had been cooled to 60° C., 124.2 g (1 mol) of potassium methacrylate and 0.6 g of N,N'-diphenyl-p-phenylenediamine were added. The mixture was then heated to 135° C. again and maintained at that temperature for 1 hour. Thereafter, it was cooled, and the potassium chloride which had precipitated was filtered off and washed with 80 g of methanol. The methanol was evaporated from the combined filtrates, and the residue was distilled under reduced pressure. 228.1 g of 3- methacryloxypropyltrimethoxysilane having a boiling point of 83° C. (0.4 mbar) were obtained. The yield was 92% of theory, based on the amount of potassium methacrylate used. The purity of the end product was 99.0%. In the gas chromatogram only traces of 4-dimethylaminopyridine were detectable.