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【结 构 式】

【分子编号】39451

【品名】methyl 2-[(1S,3S,7R,11S,12S,15S,17R,21R,23S,25S)-1,11-dimethoxy-12-[(2-methoxyacetyl)oxy]-25-[(4-methoxybenzyl)oxy]-17-[(1R)-1-[(4-methoxybenzyl)oxy]ethyl]-13-[(E)-2-methoxy-2-oxoethylidene]-10,10,26,26-tetramethyl-19-oxo-21-[(triethylsilyl)oxy]-18,27,28,29-tetraoxatetracyclo[21.3.1.1(3,7).1(11,15)]nonacos-8-en-5-ylidene]acetate

【CA登记号】

【 分 子 式 】C64H94O19Si

【 分 子 量 】1195.52446

【元素组成】C 64.3% H 7.93% O 25.43% Si 2.35%

与该中间体有关的原料药合成路线共 2 条

合成路线1

该中间体在本合成路线中的序号:(LXI)

The reaction of (LIII) with HF in pyridine/methanol gives the desilylated tricyclic intermediate (LIV), which is resilylated with TESCl and DMAP in dichloromethane and debenzylated by reaction with 1,4-cyclohexadiene over Pd/C to afford the free hydroxyacid (LV). The cyclization of (LV) by means of 2,4,6-trichlorobenzoyl chloride, i-PrNEt2 and DMAP gives the macrocycle (LVI), which is selectively deprotected with PPTS in methanol/HC(OEt)3/dichloromethane, and oxidized with Dess Martin periodinane (DMP) in pyridine/dichloromethane yielding the diketone (LVII). The reaction of (LVII) with the Fuji's chiral phosphonate (LVIII) by means of NaHMDS in THF affords the C13 enoate (LIX), which is condensed with methyl glyoxylate by means of KHMDS in THF to give the C21 enoate (LX). The stereoselective reduction of the carbonyl group of (LX) with BH3/SMe2 catalyzed by the oxazaborolidine (A), followed by esterification with methoxyacetic anhydride provides the methoxyacetate (LXI).

1 Lautens, M.; Prunet, J.A.; Carreira, E.M.; Carter, P.H.; Charette, A.B.; Evans, D.A.; Total synthesis of bryostatin 2. J Am Chem Soc 1999, 121, 33, 7540.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
40732 methyl 2-oxoacetate 922-68-9 C3H4O3 详情 详情
(A) 39460 1-methyl-3,3-diphenyltetrahydro-3H-pyrrolo[1,2-c][1,3,2]oxazaborole C18H20BNO 详情 详情
(LIII) 39443   C79H132O15Si4 详情 详情
(LIV) 39444   C56H78O15 详情 详情
(LV) 39445   C61H100O15Si2 详情 详情
(LVI) 39446   C61H98O14Si2 详情 详情
(LVII) 39447 (1S,3S,7R,11S,15S,17R,21R,23S,25S)-1,11-dimethoxy-25-[(4-methoxybenzyl)oxy]-17-[(1R)-1-[(4-methoxybenzyl)oxy]ethyl]-10,10,26,26-tetramethyl-21-[(triethylsilyl)oxy]-18,27,28,29-tetraoxatetracyclo[21.3.1.1(3,7).1(11,15)]nonacos-8-ene-5,12,19-trione C55H82O14Si 详情 详情
(LVIII) 39448 methyl 2-(2-oxo-2lambda(5)-dinaphtho[2,1-d:1,2-f][1,3,2]dioxaphosphepin-2-yl)acetate C23H17O5P 详情 详情
(LIX) 39449 methyl 2-[(1S,3S,7R,11S,15S,17R,21R,23S,25S)-1,11-dimethoxy-25-[(4-methoxybenzyl)oxy]-17-[(1R)-1-[(4-methoxybenzyl)oxy]ethyl]-10,10,26,26-tetramethyl-12,19-dioxo-21-[(triethylsilyl)oxy]-18,27,28,29-tetraoxatetracyclo[21.3.1.1(3,7).1(11,15)]nonacos-8-en-5-ylidene]acetate C58H86O15Si 详情 详情
(LX) 39450 methyl 2-[(1S,3S,7R,11S,15S,17R,21R,23S,25S)-1,11-dimethoxy-25-[(4-methoxybenzyl)oxy]-17-[(1R)-1-[(4-methoxybenzyl)oxy]ethyl]-13-[(E)-2-methoxy-2-oxoethylidene]-10,10,26,26-tetramethyl-12,19-dioxo-21-[(triethylsilyl)oxy]-18,27,28,29-tetraoxatetracyclo[21.3.1.1(3,7).1(11,15)]nonacos-8-en-5-ylidene]acetate C61H88O17Si 详情 详情
(LXI) 39451 methyl 2-[(1S,3S,7R,11S,12S,15S,17R,21R,23S,25S)-1,11-dimethoxy-12-[(2-methoxyacetyl)oxy]-25-[(4-methoxybenzyl)oxy]-17-[(1R)-1-[(4-methoxybenzyl)oxy]ethyl]-13-[(E)-2-methoxy-2-oxoethylidene]-10,10,26,26-tetramethyl-19-oxo-21-[(triethylsilyl)oxy]-18,27,28,29-tetraoxatetracyclo[21.3.1.1(3,7).1(11,15)]nonacos-8-en-5-ylidene]acetate C64H94O19Si 详情 详情

合成路线2

该中间体在本合成路线中的序号:(LXI)

The desilylation and C9 demethylation of (LXI) with PPTS in THF/H2O gives the dihydroxy intermediate (LXII), which is deacetylated with Na2CO3 in MeOH to yield the trihydroxy intermediate (LXIII). The demethylation of the C19 methoxy group of (LXIII) with TsOH in CH3CN/H2O affords the tetrahydroxy compound (LXIV), which is selectively acylated at the C20 hydroxy group with 2(E),4(E)-octadienoic acid (LXV) by means of diisopropylcarbodiimidde (DIP) and DMAP in CH2Cl2 providing the ester (LXVI). The elimination of the 4-methoxybenzyl protecting groups of (LXVII) by means of DDQ in a buffered solution gives the precursor Bryostatin 2 (LXVII).

1 Lautens, M.; Prunet, J.A.; Carreira, E.M.; Carter, P.H.; Charette, A.B.; Evans, D.A.; Total synthesis of bryostatin 2. J Am Chem Soc 1999, 121, 33, 7540.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(LXI) 39451 methyl 2-[(1S,3S,7R,11S,12S,15S,17R,21R,23S,25S)-1,11-dimethoxy-12-[(2-methoxyacetyl)oxy]-25-[(4-methoxybenzyl)oxy]-17-[(1R)-1-[(4-methoxybenzyl)oxy]ethyl]-13-[(E)-2-methoxy-2-oxoethylidene]-10,10,26,26-tetramethyl-19-oxo-21-[(triethylsilyl)oxy]-18,27,28,29-tetraoxatetracyclo[21.3.1.1(3,7).1(11,15)]nonacos-8-en-5-ylidene]acetate C64H94O19Si 详情 详情
(LXII) 39452 methyl 2-[(1S,3S,7R,11S,12S,15S,17R,21R,23R,25S)-1,21-dihydroxy-11-methoxy-12-[(2-methoxyacetyl)oxy]-25-[(4-methoxybenzyl)oxy]-17-[(1R)-1-[(4-methoxybenzyl)oxy]ethyl]-13-[(E)-2-methoxy-2-oxoethylidene]-10,10,26,26-tetramethyl-19-oxo-18,27,28,29-tetraoxatetracyclo[21.3.1.1(3,7).1(11,15)]nonacos-8-en-5-ylidene]acetate C57H78O19 详情 详情
(LXIII) 39453 methyl 2-[(1S,3S,7R,11S,12S,15S,17R,21R,23R,25S)-1,12,21-trihydroxy-11-methoxy-25-[(4-methoxybenzyl)oxy]-17-[(1R)-1-[(4-methoxybenzyl)oxy]ethyl]-13-[(E)-2-methoxy-2-oxoethylidene]-10,10,26,26-tetramethyl-19-oxo-18,27,28,29-tetraoxatetracyclo[21.3.1.1(3,7).1(11,15)]nonacos-8-en-5-ylidene]acetate C54H74O17 详情 详情
(LXIV) 39454 methyl 2-[(1S,3S,7R,11S,12S,15S,17R,21R,23R,25S)-1,11,12,21-tetrahydroxy-25-[(4-methoxybenzyl)oxy]-17-[(1R)-1-[(4-methoxybenzyl)oxy]ethyl]-13-[(E)-2-methoxy-2-oxoethylidene]-10,10,26,26-tetramethyl-19-oxo-18,27,28,29-tetraoxatetracyclo[21.3.1.1(3,7).1(11,15)]nonacos-8-en-5-ylidene]acetate C53H72O17 详情 详情
(LXV) 39455 (2E,4E)-2,4-octadienoic acid C8H12O2 详情 详情
(LXVI) 39456 (1S,3S,7R,11S,12S,15S,17R,21R,23R,25S)-1,11,21-trihydroxy-25-[(4-methoxybenzyl)oxy]-17-[(1R)-1-[(4-methoxybenzyl)oxy]ethyl]-5,13-bis[(E)-2-methoxy-2-oxoethylidene]-10,10,26,26-tetramethyl-19-oxo-18,27,28,29-tetraoxatetracyclo[21.3.1.1(3,7).1(11,15)]nonacos-8-en-12-yl (2E,4E)-2,4-octadienoate C61H82O18 详情 详情
(LXVII) 39457 (1S,3S,7R,11S,12S,15S,17R,21R,23R,25S)-1,11,21,25-tetrahydroxy-17-[(1R)-1-hydroxyethyl]-5,13-bis[(E)-2-methoxy-2-oxoethylidene]-10,10,26,26-tetramethyl-19-oxo-18,27,28,29-tetraoxatetracyclo[21.3.1.1(3,7).1(11,15)]nonacos-8-en-12-yl (2E,4E)-2,4-octadienoate C45H66O16 详情 详情
Extended Information