Rhodium(II)-carbenoid C–H insertion reactions in the synthesis of β-oxospirane systems
作者:Pompiliu S. Aburel、Kjell Undheim
DOI:10.1039/b001988g
日期:——
A simple one-pot procedure is described for the preparation of spiro[4.4]nonane-2,7-dione derivatives from open chain bis(α-diazoketones) by two consecutive intramolecular Rh(II)-catalyzed carbenoid insertion reactions. With 1-diazo-4-(3-oxocycloalkyl)butan-2-ones as substrates, the methodology provides 2,7-dioxospiranes with a cyclopentane ring spiroannulated onto a five-, six- or seven-membered cycloalkane.
描述了一种简单的一锅法,通过两次连续的分子内Rh(II)催化的羧基插入反应,从开放链的双(α-叠氮酮)中合成spiro[4.4]非烯-2,7-二酮衍生物。以1-叠氮-4-(3-氧代环烷基)丁-2-酮为底物,该方法提供了具有环戊烷环的2,7-二氧杂螺烷,环戊烷环与五、六或七元环烷烃螺接。