Pummerer reaction of thienamycin-type cyclic vinylogous sulfide and sulfoxide.
作者:MAKOTO TAKEMURA、KUNIO HIGASHI、HIROYUKI FUJIWARA、MAKOTO SATO、MINORU FURUKAWA
DOI:10.1248/cpb.33.5190
日期:——
The Pummerer reaction of the thienamycin-type cyclic vinylogous sulfide (4) and sulfoxide (5) was studied. When the sulfide (4) was treated with tert-BuOCl and MeOH in the presence of Ag2O, an additive-type Pummerer reaction took place to produce 17 instead of the normal rearranged product (6). The sulfoxide (5), on treatment with Ac2O, (CF3CO)2O, and 2, 4, 6-collidine, underwent an intramolecular additive-type Pummerer reaction to give the bicyclic compound (19) as a main product. In the reaction of the alkoxysulfonium salt (25) with 1, 8-diazabicyclo [5.4.0] undec-7-ene (DBU), Pummerer-type rearrangement took place, giving the methoxy compound (6) in poor yield.
研究了噻吩霉素型环乙烯基硫化物(4)和亚砜(5)的普默尔反应。当硫化物(4)在 Ag2O 存在下用叔丁氧氯和 MeOH 处理时,发生了加成型普默尔反应,生成了 17,而不是正常的重排产物(6)。亚砜(5)在用 Ac2O、(CF3CO)2O 和 2,4,6-甲苯胺处理后,发生了分子内加成型普默尔反应,得到双环化合物(19)作为主要产物。在烷氧基锍盐 (25) 与 1,8-二氮杂双环 [5.4.0] 十一-7-烯(DBU)的反应中,发生了普默尔型重排,得到了甲氧基化合物 (6),但收率很低。