中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
1-(呋喃-2-基)-5-(四氢呋喃-2-基)戊-3-酮 | 1-methoxymethyl-4-tritylthio-2-azetidinone | 75939-54-7 | C24H23NO2S | 389.518 |
—— | (+/-)-Methyl 4-(triphenylmethylthio)-2-oxoazetidin-1-ylacetate | 353461-16-2 | C25H23NO3S | 417.529 |
—— | 1-(t-butyldimethylsilyl)-4-(triphenylmethylthio)azetidin-2-one | 75939-53-6 | C28H33NOSSi | 459.728 |
The preparation of (4-tritylthio-2-azetidinon-l-yl)triphenylphosphoranylideneacetates from 4-acetoxyazetidin-2-one is described. They are easily converted to mercuric or silver mercaptides. These mercaptides are acylated with a wide variety of acylating agents and cyclized to 2-substituted penem-3-carboxylates.