作者:Bert H. Bakker、Ruud M. Schonk、Hans Cerfontain
DOI:10.1002/recl.19921110405
日期:——
erythro-5-hydroxy-4-octanesulfonic acid [(RS,SR)-4u], respectively, by a similar SN2 reaction on the carbon of the CO bond. Hydrolysis of 4,5-octanesultones 1a-b with base proceeds by attack at the sulfur atom of the β-sultone ring to provide 5-hydroxy-4-octanesulfonates (4v) with retention. Reaction of carbyl sulfates 5a-b with methanol gives the methyl esters of 5-hydroxy-4-octanesulfonic acid 7a-b
甲醇使辛烷-β-磺酸内酯1a-c开环,在CO处通过S N 2取代生成β-甲氧基辛烷磺酸2a-c,且构型反转。在酸性条件下水解顺式和反式-4,5-辛烷磺酸1a-b具有立体定向性,并导致苏式-[(RR,SS)-4u ]和赤型-5-羟基-4-辛磺酸[[ RS,SR)-4u ],分别在CO键的碳上进行类似的S N 2反应。4,5-辛烷磺酸1a-b的水解碱通过攻击β-磺酸内酯环的硫原子而继续提供5-羟基-4-辛烷磺酸(4v)并保留。羰基硫酸盐5a-b与甲醇反应,以立体有择的方式得到5-羟基-4-辛烷磺酸7a-b的甲酯,并保留了甲醇攻击磺酸盐硫原子的构型。