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【结 构 式】

【分子编号】68718

【品名】(R,Z)-benzyl 4-(((E)-3-(1,4-dioxaspiro[4.5]dec-7-en-7-yl)acryloyl)oxy)pent-2-enoate

【CA登记号】 

【 分 子 式 】C23H26O6

【 分 子 量 】398.45584

【元素组成】C 69.33% H 6.58% O 24.09%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(XVIII)

The tetracyclic aldehyde (I) is prepared as follows. Heck coupling of 3-bromo-3-cyclohexen-1-one ethylene ketal (XIII) with methyl acrylate (XIV) in the presence of PdCl2(PPh3)2 and Et3N in DMF at 75 °C gives the dienoate ester (XV), which is hydrolyzed to the corresponding carboxylic acid (XVI) using NaOH in THF/MeOH. Subsequent DCC-mediated coupling of acid (XVI) with alcohol (XVII) in the presence of 4-pyrrolidinopyridine (4-Ppy) in CH2Cl2 affords the triene ester (XVIII). Intramolecular Diels–Alder reaction in triene (XVIII) by heating in xylene at 215 °C results in a tetracyclic intermediate, which undergoes epimerization at C9a by means of DBU in THF to provide the cis-lactone (XIX). The benzyl ester group of (XIX) is then removed by catalytic hydrogenolysis over Pd/C in EtOAc, and subsequent diastereoselective hydrogenation of the internal double bond over PtO2 in EtOAc affords the tetracyclic carboxylic acid (XX). Finally,chlorination of acid (XX) with SOCl2 in toluene at 180 °C followed by reduction of the resulting acid chloride with Bu3SnH in the presence of Pd(PPh3)4 in toluene yields the key aldehyde (I) .
Hydroxy ester (XVII) is obtained by protection of 2(R)-butynol (XXI) as the corresponding tetrahydropyranyl ether (XXII) with DHP in the presence of p-TsOH. Subsequent deprotonation of the terminal alkyne in compound (XXII) by means of BuLi and treatment with PhCH2OCOCl in THF at –78 °C followed by acidic THP group hydrolysis yields benzyl ester (XXIII), which is finally submitted to partial reduction of the triple bond by hydrogenation over Lindlar catalyst in THF .

2 Chackalamannil, S., Asberom, T., Xia, Y., Doller, D., Clasby, M.C.,Czarniecki, M.F. Thrombin receptor antagonists. US 6063847.
1 Clasby, M.C., Chackalamannil, S., Czarniecki, M. et al. Metabolism-based identification of a potent thrombin receptor antagonist. J Med Chem 2007, 50(1): 129-38.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(XXXII) 68728 (R,E)-4-hydroxy-N,N-diphenylpent-2-enamide;4(R)-hydroxy-N,Ndiphenyl-2-pentenamide   C17H17NO2 详情 详情
(I) 68713 (1'R,3a'R,4a'R,8a'R,9a'S)-1'-methyl-3'- oxodecahydro-1'H-spiro[[1,3]dioxolane-2,6'-naphtho [2,3-c]furan]-9'-carbaldehyde   C16H22O5 详情 详情
(IX) 68708 (3S,3aS,4R,4aS,7S,8aS,9aS)-7-amino-3-methyl-1-oxododecahydronaphtho[2,3-c]furan-4-carboxylic acid   C14H21NO4 详情 详情
(XIII) 68714 3-bromo-3-cyclohexen-1-one ethylene ketal;7-bromo-1,4-Dioxaspiro[4.5]dec-7-ene 81036-84-2 C8H11BrO2 详情 详情
(XIV) 14156 methyl acrylate 96-33-3 C4H6O2 详情 详情
(XV) 68715 (E)-methyl 3-(1,4-dioxaspiro[4.5]dec-7-en-7-yl)acrylate   C12H16O4 详情 详情
(XVI) 68716 (E)-3-(1,4-dioxaspiro[4.5]dec-7-en-7-yl)acrylic acid   C11H14O4 详情 详情
(XVI) 68716 (E)-3-(1,4-dioxaspiro[4.5]dec-7-en-7-yl)acrylic acid   C11H14O4 详情 详情
(XVII) 68717 (R,E)-benzyl 4-hydroxypent-2-enoate   C12H14O3 详情 详情
(XVIII) 68718 (R,Z)-benzyl 4-(((E)-3-(1,4-dioxaspiro[4.5]dec-7-en-7-yl)acryloyl)oxy)pent-2-enoate   C23H26O6 详情 详情
(XIX) 68721 (1'R,3a'R,8a'R,9'S,9a'S)-benzyl 1'-methyl-3'-oxo-3',3a',5',7',8',8a',9',9a'-octahydro-1'H-spiro[[1,3]dioxolane-2,6'-naphtho[2,3-c]furan]-9'-carboxylate   C23H28O6 详情 详情
(XX) 68722 (1'R,3a'R,8a'R,9'S,9a'S)-1'-methyl-3'-oxodecahydro-1'H-spiro[[1,3]dioxolane-2,6'-naphtho[2,3-c]furan]-9'-carboxylic acid   C16H22O6 详情 详情
(XXI) 68719 2(R)-butynol;(R)-but-3-yn-2-ol 42969-65-3 C4H6O 详情 详情
(XXI) 68719 2(R)-butynol;(R)-but-3-yn-2-ol 42969-65-3 C4H6O 详情 详情
(XXII) 68720 2-((R)-but-3-yn-2-yloxy)tetrahydro-2H-pyran   C9H14O2 详情 详情
(XXIII) 68723 (R)-benzyl 4-hydroxypent-2-ynoate   C12H12O3 详情 详情
(XXIII) 68723 (R)-benzyl 4-hydroxypent-2-ynoate   C12H12O3 详情 详情
(XXVIII) 68724 (R)-(but-3-yn-2-yloxy)trimethylsilane   C7H14OSi 详情 详情
(XXIX) 68725 1-(diphenylcarbamoyl)imidazole;N,N-diphenyl-1H-imidazole-1-carboxamide   C16H13N3O 详情 详情
(XXX) 68726 (R)-4-hydroxy-N,N-diphenylpent-2-ynamide;4(R)-hydroxy-N,N-diphenyl-2-pentynamide;4-hydroxy-N,N-diphenyl-(4R)-2-Pentynamide 899809-61-1 C17H15NO2 详情 详情
(XXXI) 68727 4-hydroxy-N,N-diphenyl-2-pentynamide   C17H15NO2 详情 详情
(XXXIII) 68729 (E)-(R,Z)-5-(diphenylamino)-5-oxopent-3-en-2-yl 3-(1,4-dioxaspiro[4.5]dec-7-en-7-yl)acrylate   C28H29NO5 详情 详情
(XXXIV) 68730 (1'R,3a'R,8a'R,9'S,9a'S)-1'-methyl-3'-oxo-N,N-diphenyl-3',3a',5',7',8',8a',9',9a'-octahydro-1'H-spiro[[1,3]dioxolane-2,6'-naphtho[2,3-c]furan]-9'-carboxamide   C28H29NO5 详情 详情
(XXXV) 68731 (1'R,3a'R,4a'R,8a'R,9'S,9a'S)-1'-methyl-3'-oxo-N,N-diphenyldecahydro-1'H-spiro[[1,3]dioxolane-2,6'-naphtho[2,3-c]furan]-9'-carboxamide   C28H31NO5 详情 详情
(XXXVI) 68732 (3S,3aS,4R,4aS,8aS,9aS)-3-methyl-1,7-dioxododecahydronaphtho[2,3-c]furan-4-carboxylic acid   C14H18O5 详情 详情
(XXXVII) 68733 (E)-3-(5-nitrocyclohex-1-en-1-yl)acrylic acid;3-(5-nitro-1-cyclohexenyl)-2-propenoic acid   C9H11NO4 详情 详情
(XXXVIII) 68735 (4R)-benzyl 4-(((E)-3-(5-nitrocyclohex-1-en-1-yl)acryloyl)oxy)pent-2-ynoate   C21H21NO6 详情 详情
(XXXIX) 68734 (4R)-benzyl 4-(((E)-3-(5-nitrocyclohex-1-en-1-yl)acryloyl)oxy)pent-2-enoate   C21H23NO6 详情 详情
(XL) 68736 (3S,3aS,4R,4aS,7R,9aS)-benzyl 3-methyl-7-nitro-1-oxo-1,3,3a,4,4a,5,6,7,8,9a-decahydronaphtho[2,3-c]furan-4-carboxylate   C21H23NO6 详情 详情
Extended Information