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【结 构 式】

【分子编号】18660

【品名】5-chloro-1H-1,2-benzisothiazole-1,1,3(2H)-trione

【CA登记号】

【 分 子 式 】C7H4ClNO3S

【 分 子 量 】217.6324

【元素组成】C 38.63% H 1.85% Cl 16.29% N 6.44% O 22.05% S 14.73%

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:(III)

Ortho lithiation of sulfonamide (I) with n-butyllithium, followed by carbonation with CO2 afforded benzoic acid (II). Subsequent cyclization with PPA with concomitant elimination of the N-tert-butyl group provided the saccharin analogue (III). Alkylation of the sodium salt of (III) with 1,4-dibromobutane (IV) in DMF yielded bromide (V). The reductive alkylation of 2-aminophenol (VI) with 1-tert-butoxycarbonyl-4-piperidone (VII) in the presence of sodium tri(acetoxy)borohydride provided the aminopiperidine (VIII), which was cyclized with triphosgene to afford benzoxazolone (IX). Then, removal of the N-Boc protecting group provided piperidine (X), which was finally alkylated with bromide (V) in the presence of Et3N in DMF at 80 C to furnish the title compound.

1 Nerenberg, J.B.; Erb, J.M.; Thompson, W.J.; Lee, H.Y.; Guare, J.P.; Munson, P.M.; Bergman, J.M.; Huff, J.R.; Broten, T.P.; Chang, R.S.; Chen, T.B..; O'Malley, S.; Schorn, T.W.; Scott, A.L.; Design and synthesis of N-alkylated saccharins as selective alpha1-a adrenergic receptor antagonists. Bioorg Med Chem Lett 1998, 8, 18, 2467.
2 Lombardino, J.G.; Preparation of substituted 1,2-benzoisothiazolin-3-one 3 1,1-dioxides (o-benzoic sulfimides). J Org Chem 1971, 36, 13, 1843.
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) 18658 N-(tert-butyl)-4-chlorobenzenesulfonamide C10H14ClNO2S 详情 详情
(II) 18659 2-[(tert-butylamino)sulfonyl]-5-chlorobenzoic acid C11H14ClNO4S 详情 详情
(III) 18660 5-chloro-1H-1,2-benzisothiazole-1,1,3(2H)-trione C7H4ClNO3S 详情 详情
(IV) 11883 1,4-Dibromobutane; 1,4-Butylene bromide 110-52-1 C4H8Br2 详情 详情
(V) 18400 2-(4-bromobutyl)-5-chloro-1H-1,2-benzisothiazole-1,1,3(2H)-trione C11H11BrClNO3S 详情 详情
(VI) 18663 o-aminophenol; 2-aminophenol 95-55-6 C6H7NO 详情 详情
(VII) 18620 tert-butyl 4-oxo-1-piperidinecarboxylate;BOC-Piperidone;N-(tert-Butoxycarbonyl)-4-piperidone; N-Boc-4-piperidone 79099-07-3 C10H17NO3 详情 详情
(VIII) 18665 tert-butyl 4-(2-hydroxyanilino)-1-piperidinecarboxylate C16H24N2O3 详情 详情
(IX) 18666 tert-butyl 4-[2-oxo-1,3-benzoxazol-3(2H)-yl]-1-piperidinecarboxylate C17H22N2O4 详情 详情
(X) 18667 3-(4-piperidinyl)-1,3-benzoxazol-2(3H)-one C12H14N2O2 详情 详情
Extended Information