Preparation of Spiro[4.4]oxaphospholene and -azaphospholene Systems from Carbohydrate Templates
摘要:
Introduction of a spiro-phosphorus cycle in position 3 of monosaccharidic derivatives was studied starting from cyanohydrin or aminonitrile A. A two-step procedure involving (i) phosphonylation and (ii) carbanion-mediated phosphonate intramolecular cyclization (denoted CPIC) was used. The necessity of having an electron-withdrawing group alpha to the phosphorus atom in order to avoid undesired reactions was demonstrated.
Preparation of Spiro[4.4]oxaphospholene and -azaphospholene Systems from Carbohydrate Templates
作者:Marina Moura、Solen Josse、Denis Postel
DOI:10.1021/jo400954p
日期:2013.9.20
Introduction of a spiro-phosphorus cycle in position 3 of monosaccharidic derivatives was studied starting from cyanohydrin or aminonitrile A. A two-step procedure involving (i) phosphonylation and (ii) carbanion-mediated phosphonate intramolecular cyclization (denoted CPIC) was used. The necessity of having an electron-withdrawing group alpha to the phosphorus atom in order to avoid undesired reactions was demonstrated.