Seleno-β-lactams: synthesis of monocyclic and spirocyclic selenoazetidin-2-ones
摘要:
An efficient protocol for the synthesis of novel seleno-beta-lactams using operationally simple strategies is presented. 3-Phenyl/benzylseleno-beta-lactams, obtained from 2-phenyl/benzylselenoethanoic acids, are transformed to cis-3-chloro-3-phenyl/benzylseleno-beta-lactams, which undergo reaction with various active aliphatic and aromatic substrates catalyzed by Lewis acid to produce cis-3-alkoxy-3-phenyl/ benzylseleno-beta-lactams and C-3 monosubstituted seleno-beta-lactams. Halogen mediated intraselenyl cyclization of cis-3-(prop-2-ynyloxy)3-benzylseleno-beta-lactams affords novel spiro seleno-beta-lactams. (c) 2007 Elsevier Ltd. All rights reserved.
Seleno-β-lactams: synthesis of monocyclic and spirocyclic selenoazetidin-2-ones
摘要:
An efficient protocol for the synthesis of novel seleno-beta-lactams using operationally simple strategies is presented. 3-Phenyl/benzylseleno-beta-lactams, obtained from 2-phenyl/benzylselenoethanoic acids, are transformed to cis-3-chloro-3-phenyl/benzylseleno-beta-lactams, which undergo reaction with various active aliphatic and aromatic substrates catalyzed by Lewis acid to produce cis-3-alkoxy-3-phenyl/ benzylseleno-beta-lactams and C-3 monosubstituted seleno-beta-lactams. Halogen mediated intraselenyl cyclization of cis-3-(prop-2-ynyloxy)3-benzylseleno-beta-lactams affords novel spiro seleno-beta-lactams. (c) 2007 Elsevier Ltd. All rights reserved.
Seleno-β-lactams: synthesis of monocyclic and spirocyclic selenoazetidin-2-ones
作者:Aman Bhalla、Paloth Venugopalan、Kuldip K. Bhasin、Shamsher S. Bari
DOI:10.1016/j.tet.2007.02.001
日期:2007.4
An efficient protocol for the synthesis of novel seleno-beta-lactams using operationally simple strategies is presented. 3-Phenyl/benzylseleno-beta-lactams, obtained from 2-phenyl/benzylselenoethanoic acids, are transformed to cis-3-chloro-3-phenyl/benzylseleno-beta-lactams, which undergo reaction with various active aliphatic and aromatic substrates catalyzed by Lewis acid to produce cis-3-alkoxy-3-phenyl/ benzylseleno-beta-lactams and C-3 monosubstituted seleno-beta-lactams. Halogen mediated intraselenyl cyclization of cis-3-(prop-2-ynyloxy)3-benzylseleno-beta-lactams affords novel spiro seleno-beta-lactams. (c) 2007 Elsevier Ltd. All rights reserved.