Azzindani/Open_Reaction_Data huggingface dataset:
Reaction SMILES: [F:1][C:2]1[CH:7]=[CH:6][C:5]([F:8])=[CH:4][C:3]=1[C@H:9]1[CH2:13][CH2:12][CH2:11][N:10]1[C:14]1[CH:19]=[CH:18][N:17]2[N:20]=[CH:21][C:22]([C:23](O)=[O:24])=[C:16]2[N:15]=1.S(Cl)(Cl)=O.[NH2:30][C:31]1[C:36]([CH3:37])=[CH:35][CH:34]=[CH:33][N:32]=1>C(Cl)(Cl)(Cl)Cl>[F:1][C:2]1[CH:7]=[CH:6][C:5]([F:8])=[CH:4][C:3]=1[C@H:9]1[CH2:13][CH2:12][CH2:11][N:10]1[C:14]1[CH:19]=[CH:18][N:17]2[N:20]=[CH:21][C:22]([C:23]([NH:30][C:31]3[C:36]([CH3:37])=[CH:35][CH:34]=[CH:33][N:32]=3)=[O:24])=[C:16]2[N:15]=1
Reactant: Cc1cccnc1N
Reactant: O=C(O)c1cnn2ccc(N3CCC[C@@H]3c3cc(F)ccc3F)nc12
Solvent: ClC(Cl)(Cl)Cl
Solvent: O=S(Cl)Cl
Product: Cc1cccnc1NC(=O)c1cnn2ccc(N3CCC[C@@H]3c3cc(F)ccc3F)nc12
Temperature: 25 °C
Yield: 22.4 %

Procedure:
To a suspension of (R)-5-(2-(2,5-difluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidine-3-carboxylic acid (Preparation C, 25.0 mg, 0.072 mmol) in CCl4 (1.0 mL) was added thionyl chloride (0.10 mL) and the mixture heated at reflux for 4 hours. The mixture was cooled to ambient temperature and was concentrated to a brittle foam. The foam was dissolved in pyridine (2 mL), 2-amino-3-methyl-pyridine (9.3 mg, 0.086 mmol) was added and the mixture was heated at 90° C. for 20 hours. The reaction was cooled to ambient temperature and the pyridine evaporated. The residue was partitioned into 1M NaOH and EtOAc, mixed and the EtOAc layer removed. The aqueous layer was extracted with EtOAc and combined EtOAc fractions were washed with H2O, saturated NaCl and dried over MgSO4. The solution was filtered and concentrated, and the resulting solid was washed with dry Et2O to afford the title compound as a white solid (7 mg, 29%). MS (apci) m/z=435.1 (M+H).
Reaction SMILES: [C:1]([OH:4])(=O)[CH3:2].[NH2:5][CH2:6][CH2:7][NH:8][CH2:9][CH2:10]O.O>C1(C)C=CC=CC=1>[OH:4][CH2:1][CH2:2][N:8]1[CH2:7][CH2:6][N:5]=[C:9]1[CH3:10]
Reactant: NCCNCCO
Reactant: CC(=O)O
Solvent: Cc1ccccc1
Solvent: O
Product: CC1=NCCN1CCO

Procedure:
Sixty parts (1 mole) of acetic acid was added little by little to 104 parts (1 mole) of N-(beta-aminoethyl) ethanolamine and 16 parts of toluene. After generation of the heat of neutralization reaction ceased, the mixture was heated under reflux at 150° to 160° C. until 36 parts (2 moles) of water distilled. Finally, the solvent was removed under reduced pressure to give 128 parts of N-hydroxyethyl-2-methylimidazoline (amine value about 440). Then, 380 parts (1 mole) of bisphenol A diglycidyl ether having an epoxy equivalent of about 190, 85 parts (0.1mole) of polycaprolactone diol having a hydroxyl equivalent of about 425 and 1.28 parts of the N-hydroxyethyl-2-methylimidazoline obtained above were mixed under heat, and reacted at 140° C. until the epoxy value of the product decreased to 3.8 (mg equivalent/1 g of solids; the same unit applies hereinafter), and then 114 parts (0.5 mole) of bisphenol A was added, and the mixture was reacted at 130° C. until the epoxy value of the product decreased to 1.35. Then, the reaction mixture was diluted with 219 parts of ethylene glycol monobutyl ether and cooled. An 80% aqueous solution of a diethylene-triamine/ ethylene carbonate adduct (mole ratio 1:2) prepared in advance (139.5 parts; 0.4 mole) was added, and the misture was reacted at 90° C. until the amine value of the product decreased to 2 or below (mg of KOH/g of resin solids; the same unit applies hereinafter). The reaction mixture was further reacted with 38.4 parts (0.3 mole) of the above N-hydroxyethyl -2-methylimidazoline until there was no rise in viscosity. As a result, an epoxy resin derivative in accordance with this invention was obtained.
Reaction SMILES: FC(F)(F)S(O[CH2:7][C:8]([F:16])([F:15])[C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][N:10]=1)(=O)=O.[N-:19]=[N+:20]=[N-:21].[Na+]>CN(C=O)C.O>[F:15][C:8]([F:16])([C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][N:10]=1)[CH2:7][N:19]=[N+:20]=[N-:21]
Reactant: [N-]=[N+]=[N-]
Reactant: O=S(=O)(OCC(F)(F)c1ccccn1)C(F)(F)F
Agent: [Na+]
Solvent: CN(C)C=O
Solvent: O
Product: [N-]=[N+]=NCC(F)(F)c1ccccn1
Reaction time: 1.5 h

Procedure:
A solution of 105 mg (0.31 mmol) of 2,2-difluoro-2-(2-pyridyl)ethyl trifluoromethanesulfonate and 43 mg (0.66 mmol) of sodium azide in 1.0 ml of DMF was heated at 60° C. After 1.5 h, the mixture was cooled, diluted with water and extracted with two portions of ether. The combined organic layers were washed twice with water, brine and dried over MgSO4. The solvents were removed at reduced pressure to give 1-9 as a brown oil: 1H NMR (CDCl3) δ8.68 (d, 1H, 4.2 Hz), 7.86 (td,1H, 7.8, 1.5 Hz), 7.72 (d, 1H, 7.8 Hz), 7.40-7.45 (m, 1H), 4.03 (t, 2 H, 13.2 Hz).
Reaction SMILES: Br.Cl[C:3]1[CH:4]=[C:5]([CH3:13])[C:6]2[N:7]([C:9]([NH2:12])=[N:10][N:11]=2)[N:8]=1.CN(C=O)C.[CH2:19]([NH:21][CH2:22][CH3:23])[CH3:20]>O>[CH2:19]([N:21]([CH2:22][CH3:23])[C:3]1[CH:4]=[C:5]([CH3:13])[C:6]2[N:7]([C:9]([NH2:12])=[N:10][N:11]=2)[N:8]=1)[CH3:20]
Reactant: Cc1cc(Cl)nn2c(N)nnc12
Reactant: CCNCC
Agent: Br
Solvent: CN(C)C=O
Solvent: O
Product: CCN(CC)c1cc(C)c2nnc(N)n2n1
Reaction time: 264 h

Procedure:
6-Chloro-8-methyl-[1,2,4]triazolo[4,3-b]pyridazin-3-ylamine hydrobromide (W2.002; 250 mg) was dissolved in abs. DMF (2 ml) and admixed with diethylamine (7 ml). Thereafter, the reaction mixture was placed into a heating block at 80° C. with stirring for 11 days. The solvent was then drawn off and the residue was admixed with a little water and extracted three times with dichloromethane. The combined organic phases were dried over sodium sulfate, filtered and concentrated. The residue was purified by means of preparative HPLC (met. A), and the clean product fractions were combined, freed of the acetonitrile under reduced pressure, alkalized with saturated potassium carbonate solution and extracted repeatedly with dichloromethane. The combined organic phases were dried over sodium sulfate, filtered and concentrated. 100 mg of the title compound were obtained.
Reaction SMILES: P(N)(=O)([O-])[O-].[NH2:6][C:7]1[N:15]=[C:14]2[C:10]([N:11]=[CH:12][N:13]2[CH:16]2[C@:20]([CH3:22])([OH:21])[CH2:19][C@@H:18]([CH2:23][OH:24])[O:17]2)=[C:9]([O:25][CH3:26])[N:8]=1.C([Mg]Cl)(C)(C)C.Cl[C:34]1[CH:43]=[CH:42][C:41]2[C:36](=[CH:37][CH:38]=[CH:39][CH:40]=2)[C:35]=1[O:44][P:45](=[N:47][C@@H:48]([CH3:59])[C:49]([O:51][CH2:52][C:53]1[CH:58]=[CH:57][CH:56]=[CH:55][CH:54]=1)=[O:50])=[O:46]>C1COCC1>[NH2:6][C:7]1[N:15]=[C:14]2[C:10]([N:11]=[CH:12][N:13]2[CH:16]2[O:17][C@H:18]([CH2:23][O:24][C:34]3[CH:43]=[CH:42][C:41]4[C:36](=[CH:37][CH:38]=[CH:39][CH:40]=4)[C:35]=3[O:44][P:45](=[N:47][C@@H:48]([CH3:59])[C:49]([O:51][CH2:52][C:53]3[CH:54]=[CH:55][CH:56]=[CH:57][CH:58]=3)=[O:50])=[O:46])[CH2:19][C@:20]2([OH:21])[CH3:22])=[C:9]([O:25][CH3:26])[N:8]=1
Reactant: COc1nc(N)nc2c1ncn2C1O[C@H](CO)C[C@@]1(C)O
Reactant: C[C@H](N=[P+]([O-])Oc1c(Cl)ccc2ccccc12)C(=O)OCc1ccccc1
Agent: CC(C)(C)[Mg]Cl
Agent: NP(=O)([O-])[O-]
Solvent: C1CCOC1
Product: COc1nc(N)nc2c1ncn2C1O[C@H](COc2ccc3ccccc3c2O[P+]([O-])=N[C@@H](C)C(=O)OCc2ccccc2)C[C@@]1(C)O
Yield: 58.5 %

Procedure:
Using the general procedure for the synthesis of nucleoside 5′-phosphoramidates (Method A), to a solution of (3R,5S)-2-(2-amino-6-methoxy-9H-purin-9-yl)-5-(hydroxymethyl)-3-methyl-tetrahydrofuran-3-ol 100 mg (0.339 mmol) in 5 mL of THF, was added tert-BuMgCl 0.68 mL (0.68 mmol), followed by (2S)-benzyl 2-(chloro(naphthalen-1-yloxy)phosphorylamino)propanoate 273 mg (0.68 mmol), in 5 mL of THF. After work up and silica gel column chromatography, 131 mg of (2S)-benzyl 2-((((2S,4R)-5-(2-amino-6-methoxy-9H-purin-9-yl)-4-hydroxy-4-methyltetrahydrofuran-2-yl)methoxy)(naphthalen-1-yloxy)phosphorylamino)propanoate was obtained in a 58% yield, as an off-white solid. MS (ES+) m/e: 663.23 (MH+, 100%); Accurate mass: C32H36N6O8P calculated: 663.2332. found 663.2341.
Reaction SMILES: [Br:1][C:2]1[CH:3]=[C:4]([C@:8]2([CH2:27][F:28])[CH2:13][C@@H:12]([C:14]([F:17])([F:16])[F:15])[O:11][C:10]([NH:18]C(=O)C3C=CC=CC=3)=[N:9]2)[CH:5]=[CH:6][CH:7]=1.N1CCCN2CCCCCC=12>CO>[Br:1][C:2]1[CH:3]=[C:4]([C@:8]2([CH2:27][F:28])[CH2:13][C@@H:12]([C:14]([F:17])([F:16])[F:15])[O:11][C:10]([NH2:18])=[N:9]2)[CH:5]=[CH:6][CH:7]=1
Reactant: O=C(NC1=N[C@](CF)(c2cccc(Br)c2)C[C@@H](C(F)(F)F)O1)c1ccccc1
Solvent: C1CCC2=NCCCN2CC1
Solvent: CO
Product: NC1=N[C@](CF)(c2cccc(Br)c2)C[C@@H](C(F)(F)F)O1
Temperature: 65 °C
Yield: 54 %

Procedure:
To a solution of N-((4S,6S)-4-(3-bromophenyl)-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-yl)benzamide (1.15 g, 2.504 mmol) in MeOH 8 mL was added 2,3,4,6,7,8,9,10-octahydropyrimido[1,2-a]azepine (0.449 ml, 3.01 mmol) and the resulting mixture was heated at 65° C. for 9 h. The mixture was concentrated, and then diluted with EtOAc. The resulting solution was washed with water, saturated NH4Cl solution, dried over sodium sulfate, filtered, concentrated. The crude material was purified by column chromatographed on silica gel using 0-40% EtOAc/Hexane to give (4S,6S)-4-(3-bromophenyl)-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine (0.480 g, 1.352 mmol, 54.0% yield). MS m/z=356.9 [M+H]+. Calculated for C12H11BrF4NO2: 355.1
Reaction SMILES: [F:1][C:2]([F:7])([F:6])[C:3]([OH:5])=[O:4].[F:8][C:9]([F:14])([F:13])[C:10]([OH:12])=[O:11].FC(F)(F)C(O)=O.[Cl:22][C:23]1[CH:24]=[N:25][C:26]2[NH:27][C:28]3[CH:29]=[N:30][CH:31]=[C:32]([CH:53]=3)[CH2:33][CH2:34][C:35]3[CH:43]=[C:39]([NH:40][C:41]=1[N:42]=2)[CH:38]=[CH:37][C:36]=3[O:44][CH2:45][CH2:46][CH:47]1[CH2:52][CH2:51][NH:50][CH2:49][CH2:48]1.[F:54][C:55]1[CH:60]=[CH:59][C:58]([N:61]=[C:62]=[O:63])=[CH:57][CH:56]=1>>[F:1][C:2]([F:7])([F:6])[C:3]([OH:5])=[O:4].[F:8][C:9]([F:14])([F:13])[C:10]([OH:12])=[O:11].[Cl:22][C:23]1[CH:24]=[N:25][C:26]2[NH:27][C:28]3[CH:29]=[N:30][CH:31]=[C:32]([CH:53]=3)[CH2:33][CH2:34][C:35]3[CH:43]=[C:39]([NH:40][C:41]=1[N:42]=2)[CH:38]=[CH:37][C:36]=3[O:44][CH2:45][CH2:46][CH:47]1[CH2:48][CH2:49][N:50]([C:62]([NH:61][C:58]2[CH:59]=[CH:60][C:55]([F:54])=[CH:56][CH:57]=2)=[O:63])[CH2:51][CH2:52]1
Reactant: Clc1cnc2nc1Nc1ccc(OCCC3CCNCC3)c(c1)CCc1cncc(c1)N2
Reactant: O=C=Nc1ccc(F)cc1
Solvent: O=C(O)C(F)(F)F
Product: O=C(Nc1ccc(F)cc1)N1CCC(CCOc2ccc3cc2CCc2cncc(c2)Nc2ncc(Cl)c(n2)N3)CC1
Yield: 40 %

Procedure:
The desired compound was prepared according to the procedure of Example D41 using 6-chloro-12-(2-piperidin-4-ylethoxy)-2,4,8,18,22-pentaazatetracyclo[14.3.1.1(3,7).1(9,13)]docosa-1(20),3(22),4,6,9(21),10,12,16,18-nonaene tris(trifluoroacetate) and 1-fluoro-4-isocyanatobenzene as the starting materials in 40% yield. LCMS for C31H32ClFN7O2 (M+H)+: m/z=588.2.
Reaction SMILES: [Cl:1][C:2]1[CH:12]=[CH:11][C:5]2[CH2:6][CH2:7][NH:8][CH2:9][CH2:10][C:4]=2[C:3]=1[S:13][CH2:14][C:15]1[CH:20]=[CH:19][C:18]([C:21](=O)[NH:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[CH:17][CH:16]=1.COC1C=CC(P2(=S)SP(=S)(C3C=CC(OC)=CC=3)[S:37]2)=CC=1>O1CCOCC1>[Cl:1][C:2]1[CH:12]=[CH:11][C:5]2[CH2:6][CH2:7][NH:8][CH2:9][CH2:10][C:4]=2[C:3]=1[S:13][CH2:14][C:15]1[CH:20]=[CH:19][C:18]([C:21](=[S:37])[NH:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[CH:17][CH:16]=1
Reactant: COc1ccc(P2(=S)SP(=S)(c3ccc(OC)cc3)S2)cc1
Reactant: CC(C)(C)NC(=O)c1ccc(CSc2c(Cl)ccc3c2CCNCC3)cc1
Solvent: C1COCCO1
Product: CC(C)(C)NC(=S)c1ccc(CSc2c(Cl)ccc3c2CCNCC3)cc1
Temperature: 25 °C

Procedure:
Combine 7-chloro-6-(4-tert-butylcarbamoyl-benzylthio)-2,3,4,5-tetrahydro-1H-benzo[d]azepine (53 mg, 0.13 mmol) with 2,4-bis(4-methoxyphenyl)-1,3-dithia-2,4-diphosphetane-2,4-disulfide (Lawesson's reagent) (53 mg, 0.13 mmol) in anhydrous 1,4-dioxane (1 mL) in a sealed tube and heat at 100° C. for 2 h. Cool the reaction mixture to room temperature, concentrate in vacuo and purify the residue by SCX chromatography to obtain 7-chloro-6-(4-tert-butylthiocarbamoyl-benzylthio)-2,3,4,5-tetrahydro-1H-benzo[d]azepine as a yellow oil. Purify by reverse phase preparative HPLC [Zorbax SB-Phenyl 21.2×250 mm, 5 micron, 22 mL/min of 0.1% aqueous HCl/acetonitrile (9:1 to 1:9) over 30 min, detector at 230 nm].
Reaction SMILES: [F:1][C:2]1([F:19])[CH2:7][CH2:6][CH:5]([CH2:8][CH2:9][C:10]([C:12]2([C:15]([F:18])([F:17])[F:16])[CH2:14][CH2:13]2)=[O:11])[CH2:4][CH2:3]1.C1CCN2C(=NCCC2)CC1.Cl[Si:32]([CH2:37][CH3:38])([CH2:35][CH3:36])[CH2:33][CH3:34]>C1COCC1>[F:1][C:2]1([F:19])[CH2:3][CH2:4][CH:5]([CH2:8][CH:9]=[C:10]([C:12]2([C:15]([F:16])([F:17])[F:18])[CH2:13][CH2:14]2)[O:11][Si:32]([CH2:37][CH3:38])([CH2:35][CH3:36])[CH2:33][CH3:34])[CH2:6][CH2:7]1
Reactant: CC[Si](Cl)(CC)CC
Reactant: O=C(CCC1CCC(F)(F)CC1)C1(C(F)(F)F)CC1
Solvent: C1CCC2=NCCCN2CC1
Solvent: C1CCOC1
Product: CC[Si](CC)(CC)OC(=CCC1CCC(F)(F)CC1)C1(C(F)(F)F)CC1
Temperature: 25 °C
Reaction time: 2 h
Yield: 90.2 %

Procedure:
3-(4,4-Difluorocyclohexyl)-1-(1-trifluoromethylcyclopropyl)propan-1-one (0.200 g, 0.704 mmol) obtained in step 3 was dissolved in THF (2.0 mL). Under ice-cooled condition, DBU (0.117 mL, 0.774 mmol) and chlorotriethylsilane (0.130 mL, 0.774 mmol) were added, and the mixture was stirred at room temperature for 2 hours. The reaction mixture was extracted with heptane after adding a saturated sodium hydrogen carbonate aqueous solution. The organic layer was washed with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was then evaporated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=95/5→90/10) to give {3-(4,4-difluorocyclohexyl)-1-(1-trifluoromethylcyclopropyl)prop-1-enyloxy}triethylsilane (0.253 g, yield 90%).
Reaction SMILES: [F:1][C:2]1[CH:3]=[C:4]([CH:10]=[C:11]([F:13])[CH:12]=1)[C@H:5]([OH:9])[C:6]([OH:8])=O.Cl.[NH2:15][C@H:16]([C:20]([NH:22][N:23]1[C:29](=[O:30])[CH:28]([CH3:31])[C:27]2[CH:32]=[CH:33][C:34]([F:36])=[CH:35][C:26]=2[C:25]2[CH:37]=[CH:38][CH:39]=[CH:40][C:24]1=2)=[O:21])[CH:17]([CH3:19])[CH3:18]>>[F:13][C:11]1[CH:10]=[C:4]([CH:3]=[C:2]([F:1])[CH:12]=1)[C@H:5]([OH:9])[C:6]([NH:15][C@H:16]([C:20]([NH:22][N:23]1[C:29](=[O:30])[CH:28]([CH3:31])[C:27]2[CH:32]=[CH:33][C:34]([F:36])=[CH:35][C:26]=2[C:25]2[CH:37]=[CH:38][CH:39]=[CH:40][C:24]1=2)=[O:21])[CH:17]([CH3:19])[CH3:18])=[O:8]
Reactant: CC1C(=O)N(NC(=O)[C@@H](N)C(C)C)c2ccccc2-c2cc(F)ccc21
Reactant: O=C(O)[C@@H](O)c1cc(F)cc(F)c1
Agent: Cl
Product: CC1C(=O)N(NC(=O)[C@@H](NC(=O)[C@@H](O)c2cc(F)cc(F)c2)C(C)C)c2ccccc2-c2cc(F)ccc21

Procedure:
Following General Procedure D and using (S)-3,5-difluoromandelic acid (Example L) and 5-(L-valinyl)-amino-10-fluoro-7-methyl-5,7-dihydro-6H-dibenz[b,d]azepin-6-one hydrochloride (Example 7-W), the title compound was prepared. The product was purified by chromatography (silica, 2.5% MeOH/CHCl3).
Reaction SMILES: [CH2:1]([Li])CCC.[NH2:6][C:7]1[N:8]=[C:9]([CH:30]=[CH2:31])[C:10]([C:20]2[CH:27]=[CH:26][C:25]([O:28][CH3:29])=[CH:24][C:21]=2[CH:22]=O)=[N:11][C:12]=1[CH2:13][C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1.O>[Br-].C[P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.C1COCC1>[NH2:6][C:7]1[C:12]([CH2:13][C:14]2[CH:15]=[CH:16][CH:17]=[CH:18][CH:19]=2)=[N:11][C:10]([C:20]2[CH:27]=[CH:26][C:25]([O:28][CH3:29])=[CH:24][C:21]=2[CH:22]=[CH2:1])=[C:9]([CH:30]=[CH2:31])[N:8]=1
Reactant: [Li]CCCC
Reactant: C=Cc1nc(N)c(Cc2ccccc2)nc1-c1ccc(OC)cc1C=O
Agent: C[P+](c1ccccc1)(c1ccccc1)c1ccccc1
Agent: [Br-]
Solvent: O
Solvent: C1CCOC1
Product: C=Cc1cc(OC)ccc1-c1nc(Cc2ccccc2)c(N)nc1C=C
Temperature: 0 °C
Reaction time: 0.25 h
Yield: 65.9 %

Procedure:
Under an argon atmosphere, to a suspension of methyltriphenylphosphonium bromide (1.29 g, 3.61 mmol) in anhydrous THF (5 mL) was gradually dropwise added n-butyl lithium (1.65 M in n-hexane) (1.70 mL, 2.81 mmol) at 0° C. The mixture was stirred at 0° C. for 15 minutes as it was. To the mixture was added 2-(5-amino-6-benzyl-3-vinylpyrazin-2-yl)-5-methoxybenzaldehyde (8) (871 mg, 2.52 mmol) at 0° C. After elevating to room temperature, stirring was continued for 1.5 hours. After to this was added water, the product was extracted with ethyl acetate (×3). The combined organic extract was washed successively with water (×1) and brine (×1), followed by drying over anhydrous sodium sulfate. After filtration and concentration under reduced pressure, the residue was purified by silica gel flash column chromatography (n-hexane/ethyl acetate=3/1) to give 2-amino-3-benzyl-5-(4-methoxy-2-vinylphenyl)-6-vinylpyrazine (9) (570 mg, 1.66 mmol, 65.8%) as a white solid. TLC Rf=0.37 (n-hexane/ethyl acetate=3/1); 1H NMR (500 MHz, CDCl3) δ 3.88 (s, 3H), 4.16 (s, 2H), 4.39 (s, 2H), 5.18 (dd, 1H, J=1.0, 10.5 Hz), 5.30 (dd, 1H, J=2.0, 10.5 Hz), 5.67 (dd, 1H, J=1.0, 17.5 Hz), 6.25 (dd, 1H, J=2.0, 17.5 Hz), 6.47 (dd, 1H, J=10.5, 17.5 Hz), 6.50 (dd, 1H, J=10.5, 17.5 Hz), 6.90 (dd, 1H, J=2.5, 8.0 Hz), 7.20-7.26 (m, 5H), 7.29-7.35 (m, 2H); 13C MR. (126 MHz, CDCl3) δ 41.2, 55.6, 110.5, 113.8, 115.4, 119.3, 127.2, 128.7 (2C), 129.2 (2C), 129.8, 132.1, 133.0, 135.1, 137.0, 138.3, 140.3, 141.9, 144.8, 151.4, 159.8.
Reaction SMILES: [OH:1][C@H:2]1[CH2:22][CH2:21][C@@:20]2([CH3:23])[CH:4]([CH2:5][CH2:6][C:7]3[C:8]4[C@:16]([CH3:24])([CH2:17][CH2:18][C:19]=32)[C@@H:11]([C@H:12]([CH3:15])[CH:13]=O)[CH2:10][CH:9]=4)[C:3]1([CH3:26])[CH3:25].[N:27]1[CH:32]=[CH:31][CH:30]=[N:29][C:28]=1[N:33]1[CH2:38][CH2:37][NH:36][CH2:35][CH2:34]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>>[N:27]1[CH:32]=[CH:31][CH:30]=[N:29][C:28]=1[N:33]1[CH2:38][CH2:37][N:36]([CH2:15][C@H:12]([C@@H:11]2[C@:16]3([CH3:24])[C:8]([C:7]4[CH2:6][CH2:5][C@@H:4]5[C@:20]([C:19]=4[CH2:18][CH2:17]3)([CH3:23])[CH2:21][CH2:22][C@H:2]([OH:1])[C:3]5([CH3:26])[CH3:25])=[CH:9][CH2:10]2)[CH3:13])[CH2:35][CH2:34]1
Reactant: C[C@H](C=O)[C@H]1CC=C2C3=C(CC[C@@]21C)[C@@]1(C)CC[C@H](O)C(C)(C)C1CC3
Reactant: c1cnc(N2CCNCC2)nc1
Agent: CC(=O)O[BH-](OC(C)=O)OC(C)=O
Agent: [Na+]
Product: C[C@H](CN1CCN(c2ncccn2)CC1)[C@H]1CC=C2C3=C(CC[C@@]21C)[C@@]1(C)CC[C@H](O)C(C)(C)[C@@H]1CC3

Procedure:
(20S)-3β-hydroxy-4,4,20-trimethyl-pregna-8,14-dien-21-al was treated with N-(pyrimidin-2-yl)piperazine and sodium tris(acetoxy)borohydride as described in Example 1h). (20S)-20-[(4-(pyrimidin-2-yl)piperazin-1-yl)methyl]-4,4-dimethyl-5α-pregna-8,14-dien-3β-ol was isolated as a white solid.
Reaction SMILES: [C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][NH:11][CH:10]([C:14]([OH:16])=[O:15])[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].Cl[C:18]([O:20][CH2:21][C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1)=[O:19]>[OH-].[Na+]>[CH2:21]([O:20][C:18]([N:11]1[CH2:12][CH2:13][N:8]([C:6]([O:5][C:1]([CH3:4])([CH3:2])[CH3:3])=[O:7])[CH2:9][CH:10]1[C:14]([OH:16])=[O:15])=[O:19])[C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1
Reactant: O=C(Cl)OCc1ccccc1
Reactant: CC(C)(C)OC(=O)N1CCNC(C(=O)O)C1
Agent: [Na+]
Agent: [OH-]
Product: CC(C)(C)OC(=O)N1CCN(C(=O)OCc2ccccc2)C(C(=O)O)C1
Temperature: 0 °C
Reaction time: 8 h
Yield: 37.9 %

Procedure:
0.1 g of 4-(tert.butoxycarbonyl)-piperazine- 2-carboxylic acid was dissolved in 10 ml of 1N sodium hydroxide solution, cooled to 0° C. and treated with 0.2 g of benzyl chloroformate. The mixture was allowed to warm to room temperature and was then stirred overnight. The mixture was extracted with diethyl ether. The aqueous phase was then acidified to pH 4 with 2M hydrochloric acid and extracted with ethyl acetate to give 0.06 g of 1-(benzyloxycarbonyl)-4-(tert.butoxycarbonyl)-2-piperazinecarboxylic acid as a white solid; MS: m/e 365 [M+H]+.
Reaction SMILES: [F:1][C:2]1[CH:3]=[C:4]([N:8]2[CH2:13][CH2:12][NH:11][CH2:10][CH2:9]2)[CH:5]=[CH:6][CH:7]=1.[C:14]1([C:22]2[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=2)[CH:19]=[CH:18][CH:17]=[C:16]([CH:20]=O)[CH:15]=1.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+].C1(C2C=CC=CC=2)C=CC=CC=1CN1CCN(C2C=CC=CC=2)CC1>>[C:14]1([C:22]2[CH:23]=[CH:24][CH:25]=[CH:26][CH:27]=2)[CH:19]=[CH:18][CH:17]=[C:16]([CH2:20][N:11]2[CH2:12][CH2:13][N:8]([C:4]3[CH:5]=[CH:6][CH:7]=[C:2]([F:1])[CH:3]=3)[CH2:9][CH2:10]2)[CH:15]=1
Reactant: Fc1cccc(N2CCNCC2)c1
Reactant: O=Cc1cccc(-c2ccccc2)c1
Agent: CC(=O)O[BH-](OC(C)=O)OC(C)=O
Agent: [Na+]
Agent: c1ccc(-c2ccccc2CN2CCN(c3ccccc3)CC2)cc1
Product: Fc1cccc(N2CCN(Cc3cccc(-c4ccccc4)c3)CC2)c1

Procedure:
113.2 mg of the target compound (0.33 mmol, 59.4%) was obtained using 1-(3-fluorophenyl)piperazine (198 mg, 1.10 mmol), biphenyl-3-carbaldehyde (100 mg, 0.55 mmol) and NaBH(OAc)3 (355 mg, 1.65 mmol) according to the synthesis method of Compound 1.
Reaction SMILES: [Br:1][C:2]1[CH:3]=[C:4]([OH:8])[CH:5]=[CH:6][CH:7]=1.C([O-])([O-])=O.[Cs+].[Cs+].[CH2:15](Br)[C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1>CN(C=O)C>[Br:1][C:2]1[CH:3]=[C:4]([O:8][CH2:15][C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[CH:5]=[CH:6][CH:7]=1
Reactant: Oc1cccc(Br)c1
Reactant: BrCc1ccccc1
Agent: O=C([O-])[O-]
Agent: [Cs+]
Solvent: CN(C)C=O
Product: Brc1cccc(OCc2ccccc2)c1
Reaction time: 1 h

Procedure:
To a stirred solution of 3-bromophenol (9.50 g, 54.9 mmol) in degassed DMF (150 mL) at 0° C., under argon, was added Cs2CO3 (35.8 g, 109 mmol). The resulting mixture was stirred for 1 hour, then benzyl bromide (10.3 g, 60.2 mmol) was added and stirring was continued for 2 hours at 0° C. The solvent was removed under reduced pressure, and the residue was partitioned between 20% aqueous NaOH (250 mL) and CHCl3 (500 mL). The organic layer was dried over MgSO4, filtered, and concentrated in vacuo. The crude product was purified by flash column chromatography on silica, eluting first with two column volumes of hexane, then with hexane—2% EtOAc to yield the desired product as a white solid.
Reaction SMILES: [Br:1][C:2]1[C:3]([NH:8][C:9](=[O:16])[O:10][CH2:11][C:12]([Cl:15])([Cl:14])[Cl:13])=[N:4][O:5][C:6]=1[CH3:7].[C:17]([O:25][CH3:26])(=[O:24])[CH:18]([CH2:20][CH:21]([CH3:23])[CH3:22])O.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OC(C)C)=O)=NC(OC(C)C)=O>O.CN(C=O)C>[Br:1][C:2]1[C:3]([N:8]([C:9]([O:10][CH2:11][C:12]([Cl:14])([Cl:13])[Cl:15])=[O:16])[C@H:18]([C:17]([O:25][CH3:26])=[O:24])[CH2:20][CH:21]([CH3:23])[CH3:22])=[N:4][O:5][C:6]=1[CH3:7]
Reactant: Cc1onc(NC(=O)OCC(Cl)(Cl)Cl)c1Br
Reactant: COC(=O)C(O)CC(C)C
Agent: CC(C)OC(=O)N=NC(=O)OC(C)C
Agent: c1ccc(P(c2ccccc2)c2ccccc2)cc1
Solvent: CN(C)C=O
Solvent: O
Product: COC(=O)[C@H](CC(C)C)N(C(=O)OCC(Cl)(Cl)Cl)c1noc(C)c1Br
Temperature: 25 °C
Reaction time: 8 h

Procedure:
To a dry degassed DMF solution (50 mL) of 2,2,2-trichloroethyl 4-bromo-5-methylisoxazol-3-ylcarbamate (2.67 g, 7.58 mmol), DL methyl leucate (2.31 g, 15.8 mmol), and triphenyl phosphine (4.11 g, 15.7 mmol) was added diisopropyl azodicarboxylate (3.1 ml, 15.7 mmol) at 0° C. over 2 hours. The reaction was allowed to warm to room temperature while stirring overnight. Water was added and the product was extracted with ether (2×) then ethyl acetate (2×), dried over Na2SO4 and concentrated in vacuo. The crude product was purified by flash chromatography (20% ethyl acetate/hexane) to afford methyl N-(4-bromo-5-methylisoxazol-3-yl)-N-[(2,2,2-trichloroethoxy)carbonyl]leucinate.