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【结 构 式】

【分子编号】62623

【品名】[(3aS,4S,6S,7R,7aS)-7-azido-4-(benzyloxy)-2,2-dimethyltetrahydro-4H-[1,3]dioxolo[4,5-c]pyran-6-yl]methyl tert-butyl(diphenyl)silyl ether; {[(3aS,4S,6S,7R,7aS)-7-azido-4-(benzyloxy)-2,2-dimethyltetrahydro-4H-[1,3]dioxolo[4,5-c]pyran-6-yl]methoxy}(tert-butyl)diphenylsilane

【CA登记号】

【 分 子 式 】C32H39N3O5Si

【 分 子 量 】573.76438

【元素组成】C 66.99% H 6.85% N 7.32% O 13.94% Si 4.89%

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:(VIII)

The reaction of benzyl alpha-D-mannopyranoside (I) with Tbdms-Cl and imidazole gives the silyl ether (II), which is treated with 2,2-dimethoxypropane (III) and CSA in dichloromethane to yield the acetonide (IV). The oxidation of the free OH group of (IV) with PCC in dichloromethane affords the ketone (V), which is reduced with NaBH4 to provide benzyl 6-O-(tert-butyldimethylsilyl)-2,3-O-isopropylidene-alpha-D-talopyranoside (VI) with inverted configuration at C4. The reaction of (VI) with Tf2O and pyridine gives the triflate (VII), which is treated with NaN3 in DMF to yield the 4-azido derivative (VIII) with a new inversion of configuration at C4. The reaction of (VIII) with TBAF, followed by oxidation with PCC afforded the carbaldehyde (IX), which is condensed with the phosphorane (X) to provide the unsaturated azidoaldehyde (XI). The treatment of (XI) with H2 over Pd/C in methanol produces the reduction of the double bond, the reduction of the azide group to amine, and subsequent reductive cyclization of the resulting aminoaldehyde to give the perhydropyranopyridine derivative (XII). Further reductive debenzylation of (XII) with H2 over Pd/C in AcOH produces the formation of a lactol in equilibrium with the open chain aminoaldehyde (XIII), which undergoes a reductive amination to form the acetonide of swainsonine (XIV). Finally, this acetonide is decomposed by reaction with TFA to afford the target swainsonine.

1 Bashyal, B.P.; et al.; Synthesis of the alpha-mannosidase inhibitors swainsonine [(1S,2R,8R,8aR)-1,2,8-trihydroxyoctahydroindolizine and 1,4-dideoxy-1,4-imino-D-mannitol from mannose. Tetrahedron 1987, 43, 13, 3083.
2 Fleet, G.W.J.; et al.; Enantiospecific synthesis of swainsonine (1S,2R,8R,8aR)-1,2,8-trihydroxyoctahydroindolizine, from D-mannose. Tetrahedron Lett 1984, 25, 17, 1853.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 62617 (2S,3S,4S,5S,6R)-2-(benzyloxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol C13H18O6 详情 详情
(II) 62618 (2S,3S,4S,5S,6R)-2-(benzyloxy)-6-({[tert-butyl(diphenyl)silyl]oxy}methyl)tetrahydro-2H-pyran-3,4,5-triol C29H36O6Si 详情 详情
(III) 10722 1-Methoxy-1-methylethyl methyl ether; 2,2-Dimethoxypropane 77-76-9 C5H12O2 详情 详情
(IV) 62619 (3aS,4S,6R,7R,7aS)-4-(benzyloxy)-6-({[tert-butyl(diphenyl)silyl]oxy}methyl)-2,2-dimethyltetrahydro-4H-[1,3]dioxolo[4,5-c]pyran-7-ol C32H40O6Si 详情 详情
(V) 62620 (3aS,4S,6R,7aR)-4-(benzyloxy)-6-({[tert-butyl(diphenyl)silyl]oxy}methyl)-2,2-dimethyldihydro-4H-[1,3]dioxolo[4,5-c]pyran-7(6H)-one C32H38O6Si 详情 详情
(VI) 62621 (3aS,4S,6R,7S,7aS)-4-(benzyloxy)-6-({[tert-butyl(diphenyl)silyl]oxy}methyl)-2,2-dimethyltetrahydro-4H-[1,3]dioxolo[4,5-c]pyran-7-ol C32H40O6Si 详情 详情
(VII) 62622 (3aS,4S,6R,7S,7aR)-4-(benzyloxy)-6-({[tert-butyl(diphenyl)silyl]oxy}methyl)-2,2-dimethyltetrahydro-4H-[1,3]dioxolo[4,5-c]pyran-7-yl trifluoromethanesulfonate C33H39F3O8SSi 详情 详情
(VIII) 62623 [(3aS,4S,6S,7R,7aS)-7-azido-4-(benzyloxy)-2,2-dimethyltetrahydro-4H-[1,3]dioxolo[4,5-c]pyran-6-yl]methyl tert-butyl(diphenyl)silyl ether; {[(3aS,4S,6S,7R,7aS)-7-azido-4-(benzyloxy)-2,2-dimethyltetrahydro-4H-[1,3]dioxolo[4,5-c]pyran-6-yl]methoxy}(tert-butyl)diphenylsilane C32H39N3O5Si 详情 详情
(IX) 62624 (3aS,4S,6S,7R,7aS)-7-azido-4-(benzyloxy)-2,2-dimethyltetrahydro-4H-[1,3]dioxolo[4,5-c]pyran-6-carbaldehyde C16H19N3O5 详情 详情
(X) 55468 2-(triphenylphosphoranylidene)acetaldehyde C20H17OP 详情 详情
(XI) 62625 (E)-3-[(3aS,4S,6R,7R,7aS)-7-azido-4-(benzyloxy)-2,2-dimethyltetrahydro-4H-[1,3]dioxolo[4,5-c]pyran-6-yl]-2-propenal C18H21N3O5 详情 详情
(XII) 62626 (3aS,4S,5aR,9aR,9bS)-2,2-dimethyloctahydro-4H-[1,3]dioxolo[4',5':4,5]pyrano[3,2-b]pyridin-4-yl benzyl ether; (3aS,4S,5aR,9aR,9bS)-4-(benzyloxy)-2,2-dimethyloctahydro-4H-[1,3]dioxolo[4',5':4,5]pyrano[3,2-b]pyridine C18H25NO4 详情 详情
(XIII) 62627 (4S,5S)-5-[(2R,3R)-3-hydroxypiperidinyl]-2,2-dimethyl-1,3-dioxolane-4-carbaldehyde C11H19NO4 详情 详情
(XIV) 62616 (3aR,9R,9aR,9bS)-2,2-dimethyloctahydro[1,3]dioxolo[4,5-a]indolizin-9-ol C11H19NO3 详情 详情
Extended Information