作者:F.J. Lopez Aparicio、F. Zorrilla Benitez、F. Santoyo Gonzalez
DOI:10.1016/s0008-6215(00)88051-9
日期:1982.4
α-substitution of the thiol. The acyclic dithioacetal 2a was the only product isolated when methanethiol was used, but mixtures of acyclic dithioacetals, cis -2,6-bis(alkylthio)-1,4-dioxanes, and trans -2,6-bis(alkylthio)-1,4-dioxanes were obtained when ethanethiol, 1-propanethiol, and 2-propanethiol were used. From 1a and 2-methylpropane-2-thiol, the acyclic dithioacetal 2e and the cis (7) and trans (8) stereoisomers
摘要二甘醇醛(2,2'-oxybisacetaldehyde,1a)在类似于单糖的条件下与硫醇反应。反应产物的性质取决于硫醇的α-取代程度。无环二硫缩醛2a是使用甲硫醇时唯一分离出的产物,但无环二硫缩醛,顺式-2,6-双(烷硫基)-1,4-二恶烷和反式-2,6-双(烷硫基)-1的混合物当使用乙硫醇,1-丙硫醇和2-丙硫醇时,获得了4-4-二恶烷。从1a和2-甲基丙烷-2-硫醇中,分离出无环二硫缩醛2e和3,5-双(叔丁硫基)-1,4-氧杂蒽的顺式(7)和反式(8)立体异构体。另一方面,当在酸性介质中用伯硫醇或仲硫醇对二甘醇醛双(二烷基乙缩醛)(9a–d)或2,6-二异丙氧基-1,4-二恶烷(10)进行处理时,分离出无环二硫缩醛作为唯一产物。当在上述条件下用2-甲基丙烷-2-硫醇处理9a-d或10时,获得了无环二硫缩醛2e和oxathiane衍生物7和8。