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【结 构 式】

【分子编号】64612

【品名】(S)-[(4aR,7R,8R,8aS)-8-(benzyloxy)-2,2,7-trimethylhexahydropyrano[3,2-d][1,3]dioxin-6-yl][2-({(4S,5R,6R)-6-[4-(benzyloxy)butyl]-2,2,5-trimethyl-1,3-dioxan-4-yl}methyl)-1,3-dithian-2-yl]methanol

【CA登记号】

【 分 子 式 】C41H60O8S2

【 分 子 量 】745.0546

【元素组成】C 66.1% H 8.12% O 17.18% S 8.61%

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:(XX)

Bis-tetrahydropyran intermediate (XXIV). The asymmetric addition of Ipc2B-crotyl to 5-benzyloxypentanal (XI) gives the secondary alcohol (XII), which is protected with Boc2O and NaHMDS in THF yielding the carbamate (XIII). The reaction of (XIII) with IBr in toluene affords the iodinated cyclic carbonate (XIV), which is converted into the epoxide (XV) by reaction with K2CO3 in methanol/water. The reaction of the epoxide (XV) with 1,3-dithiane (XVI) by means of BuLi in THF/HMPA provides the dihydroxy compound (XVII), which is converted into the acetonide (XIX) by reaction with 2,2-dimethoxypropane (XVIII) and PPTS . The condensation of (XIX) with the tetrahydropyran-2-carbaldehyde intermediate (X) by means of BuLi in ethyl ether/HMPA gives the bis acetonide derivative (XX) (1), which is deprotected by means of CSA, cyclized by means of Hg(ClO4)2 and acylated with Piv-Cl and pyridine to yield the bis tetrahydropyranyl intermediate (XXI). The silylation of the OH group of (XXI) by means of Tbdms-OTf, followed by debenzylation by means of HCOONH4 and Pd/C affords the butanol derivative (XXII), which is successively silylated, first with Tbdps-Cl /imidazole and then with Tes-OTf and lutidine to provide the fully silylated compound (XXIII). Finally, the elimination of the pivaloyl group of (XXIII) by means of DIBAL in THF, followed by reaction with I2, PPh3 and imidazole in toluene gives the iodomethyl bis tetrahydropyran intermediate (XXIV) (2).

2 Smith, A.B. III; Lin, Q.; Doughty, V.A.; Zhuang, L.; McBriar, M.D.; Kerns, J.K.; Brook, C.S.; Murase, N.; Nakayama, K.; The spongistatins: Architecturally complex natural products - Part two: Synthesis of the C(29-51) subunit, fragment assembly, and final elaboration to (+)-spongistatin 2. Angew Chem. Int Ed 2001, 40, 1, 196.
1 Smith, A.B. III; Zhuang, L.; Brook, C.S.; Boldi, A.M.; McBriar, M.D.; Moser, W.H.; Murase, N.; Nakayama, K.; Verhoest, P.R.; Lin, Q.; Spongistatin synthetic studies. 1. Construction of a C(29-48) subtarget. Tetrahedron Lett 1997, 38, 50, 8667.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(X) 64603 (4aR,7R,8R,8aS)-8-(benzyloxy)-2,2,7-trimethylhexahydropyrano[3,2-d][1,3]dioxine-6-carbaldehyde C18H24O5 详情 详情
(XI) 64604 5-(benzyloxy)pentanal C12H16O2 详情 详情
(XII) 64605 (3R,4R)-8-(benzyloxy)-3-methyl-1-octen-4-ol C16H24O2 详情 详情
(XIII) 64606 (1R,2R)-1-[4-(benzyloxy)butyl]-2-methyl-3-butenyl tert-butyl carbonate C21H32O4 详情 详情
(XIV) 64607 (4R,5R)-4-[4-(benzyloxy)butyl]-6-(iodomethyl)-5-methyl-1,3-dioxan-2-one C17H23IO4 详情 详情
(XV) 64608 (1R)-5-(benzyloxy)-1-{(1R)-1-[(2S)oxiranyl]ethyl}pentyl methyl carbonate C18H26O5 详情 详情
(XVI) 42372 1,3-dithiane 505-23-7 C4H8S2 详情 详情
(XVII) 64609 (2S,3S,4R)-8-(benzyloxy)-1-(1,3-dithian-2-yl)-3-methyl-2,4-octanediol C20H32O3S2 详情 详情
(XVIII) 64610 1,3-dimethoxy-2,2-dimethylpropane; 3-methoxy-2,2-dimethylpropyl methyl ether C7H16O2 详情 详情
(XIX) 64611 (4R,5R,6S)-4-[4-(benzyloxy)butyl]-6-(1,3-dithian-2-ylmethyl)-2,2,5-trimethyl-1,3-dioxane; benzyl 4-[(4R,5R,6S)-6-(1,3-dithian-2-ylmethyl)-2,2,5-trimethyl-1,3-dioxan-4-yl]butyl ether C23H36O3S2 详情 详情
(XX) 64612 (S)-[(4aR,7R,8R,8aS)-8-(benzyloxy)-2,2,7-trimethylhexahydropyrano[3,2-d][1,3]dioxin-6-yl][2-({(4S,5R,6R)-6-[4-(benzyloxy)butyl]-2,2,5-trimethyl-1,3-dioxan-4-yl}methyl)-1,3-dithian-2-yl]methanol C41H60O8S2 详情 详情
(XXI) 64613 {(2R,3S,4R,5R,6R)-4-(benzyloxy)-6-[(S)-{(2R,4S,5R,6R)-6-[4-(benzyloxy)butyl]-4-hydroxy-2-methoxy-5-methyltetrahydro-2H-pyran-2-yl}(hydroxy)methyl]-3-hydroxy-5-methyltetrahydro-2H-pyran-2-yl}methyl pivalate C38H56O10 详情 详情
(XXII) 64614 {(2R,3S,4R,5R,6R)-6-[(S)-[(2R,4S,5S,6R)-4-{[tert-butyl(dimethyl)silyl]oxy}-6-(4-hydroxybutyl)-2-methoxy-5-methyltetrahydro-2H-pyran-2-yl](hydroxy)methyl]-3,4-dihydroxy-5-methyltetrahydro-2H-pyran-2-yl}methyl 2,2-dimethylpropanoate C30H58O10Si 详情 详情
(XXIII) 64615 {(2R,3R,4R,5S,6R)-6-{(S)-[(2R,4S,5S,6R)-4-{[tert-butyl(dimethyl)silyl]oxy}-6-(4-{[tert-butyl(diphenyl)silyl]oxy}butyl)-2-methoxy-5-methyltetrahydro-2H-pyran-2-yl][(triethylsilyl)oxy]methyl}-5-methyl-3,4-bis[(triethylsilyl)oxy]tetrahydro-2H-pyran-2-yl}methyl 2,2-dimethylpropanoate C64H118O10Si5 详情 详情
(XXIV) 64616 tert-butyl[((2R,4S,5S,6R)-6-(4-{[tert-butyl(diphenyl)silyl]oxy}butyl)-2-{(S)-{(2R,3S,4R,5R,6S)-6-(iodomethyl)-3-methyl-4,5-bis[(triethylsilyl)oxy]tetrahydro-2H-pyran-2-yl}[(triethylsilyl)oxy]methyl}-2-methoxy-5-methyltetrahydro-2H-pyran-4-yl)oxy]dimethylsilane; tert-butyl(dimethyl)silyl (2R,4S,5S,6R)-6-(4-{[tert-butyl(diphenyl)silyl]oxy}butyl)-2-{(S)-{(2R,3S,4R,5R,6S)-6-(iodomethyl)-3-methyl-4,5-bis[(triethylsilyl)oxy]tetrahydro-2H-pyran-2-yl}[(triethylsilyl)oxy]methyl}-2-methoxy-5-methyltetrahydro-2H-pyran-4-yl ether C59H109IO8Si5 详情 详情
Extended Information