1,3-Oxathiole and Thiirane Derivatives from the Reactions of Azibenzil and α-diazo amides with thiocarbonyl compounds
作者:Martin Kägi、Anthony Linden、Grzegorz Mlostoń、Heinz Heimgartner
DOI:10.1002/hlca.19980810209
日期:1998.2.4
reacted only when catalyzed with Rh2(OAc)4, and, in contrast to the previous reactions, the benzoyl-substituted thiirane derivative 5a was the sole product (Scheme 4). Both types of reaction were observed with α-diazo amides 1d,e (Schemes 5–7). It is worth mentioning that formation of 1,3-oxathiole or thiirane is not only dependent on the type of the carbonyl compound 2 but also on the α-diazo amide
在室温下,α-重氮酮1a,b与9 H-芴-9-硫酮(2f)在THF中的反应产生对称的1,3-二硫代环戊酸酯7a,b,而1b和2,2,4,4-四甲基-1,3-二硫酮(2D)在THF中在60℃导致的两种立体异构1,3- oxathiole衍生物的混合物的顺式-和反式-图9a(方案2)。与2-重氮1,2-二苯乙酮(1c),硫酮2a–d以及1,3-噻唑-5(4 H)-硫酮2g反应,仅得到1,3-氧杂硫醇衍生物(方案3和4)。由于与1c的反应比与1a,b的反应更慢,因此可通过添加LiClO 4或Rh 2(OAc)4来催化它们。在的情况下,2D在THF /的LiClO 4在室温下,所述单加成物的混合物4D和立体异构双加合物的顺式-和反式-图9b被形成了。单加成图4d可以转化为顺式-和反式- 9B与治疗1C在Rh 2(OAc)4存在下(方案4)。仅在室温下,仅在以Rh 2(OAc)4催化时,在THF中的