Cyclic Phosphine Oxides and Phosphinamides from Di-Grignard Reagents and Phosphonic Dichlorides: Modular Access to Annulated Phospholanes
作者:Aaron M. Gregson、Steven M. Wales、Stephen J. Bailey、Anthony C. Willis、Paul A. Keller
DOI:10.1021/acs.joc.5b01476
日期:2015.10.2
The reaction between 1,4-di-Grignard reagents and phosphonous(III) dichlorides is a classical method for the direct synthesis of phospholanes. Reported here is an extension of this approach to the preparation of value-added, annulated phospholane oxides, achieved through the combination of carbocyclic-fused di-Grignard reagents and readily available phosphonic(V) dichlorides. The procedure is amenable
1,4-二格氏试剂与二氯化膦(III)之间的反应是直接合成膦烷的经典方法。此处报道的是该方法扩展到制备增值的环状磷杂环戊烷氧化物的方法,该方法是通过将碳环稠合的双格氏试剂与易于获得的二氯化膦(V)结合使用而实现的。该方法适合在膦酸酯环的2,3-和3,4-位上(苯并)环化,并且以合理的至优异的产率耐受各种脂族,环状和芳基P-亲电子试剂。