Synthesis of 1-oxacephams via improved cyclization of N-substituted-4-formyloxyazetidin-2-ones
摘要:
The Lewis acid promoted cyclisation of N-substituted-4-formyloxyazetidin-2-one easily available from 4-vinyloxyazetidin-2-one is described. The efficiency of the ring closure reaction, to give 1-oxacephams, depends on the oxygen protected-activated group and the Lewis acid. (C) 1998 Elsevier Science Ltd. All rights reserved.
Functionalization of a β-lactam ring via nucleophilic displacement of a 4-vinyloxy substituent
作者:Zbigniew Kałuża
DOI:10.1016/s0040-4039(98)02516-7
日期:1999.1
A vinyloxy group at C-4 of an azetidin-2-one can be easily displaced by nucleophiles in the presence of a Lewis acid catalyst.
在路易斯酸催化剂的存在下,氮杂环丁烷-2-酮的C-4处的乙烯基氧基很容易被亲核试剂置换。
Stereocontrolled synthesis of 1-oxacepham from 4-vinyloxyazetidin-2-one, a new building block
作者:Zbigniew Kałż、Robert Łysek
DOI:10.1016/s0957-4166(97)00310-8
日期:1997.8
Synthesis of 1-oxacephams via improved cyclization of N-substituted-4-formyloxyazetidin-2-ones
作者:Zbigniew Kałuża
DOI:10.1016/s0040-4039(98)01841-3
日期:1998.11
The Lewis acid promoted cyclisation of N-substituted-4-formyloxyazetidin-2-one easily available from 4-vinyloxyazetidin-2-one is described. The efficiency of the ring closure reaction, to give 1-oxacephams, depends on the oxygen protected-activated group and the Lewis acid. (C) 1998 Elsevier Science Ltd. All rights reserved.