39598-55-5Relevant articles and documents
NEW EVIDENCE FOR AND NEW REACTIONS OF ORTHO-LITHIO YLIDS
Schaub, Bruno,Schlosser, Manfred
, p. 1623 - 1626 (2007/10/02)
While α-lithio ylid 2 may be generated from triphenylphosphonio-bromomethylid through halogen/metal exchange, the reaction of triphenylphosphonio-methylid 1 with sec- or tert-butyllithium produces nearly quantitatively the o-lithio ylid 3, which is stable at -60 deg C but slowly decomposes at higher temperatures via a cyclization product 5 to give the α-lithio phosphine 4.