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1,1‐Dialkenyl‐ und 1,1‐Dialkinyl‐2,4,6‐triphenyl‐λ 5 ‐phosphinine
Author(s) -
Dimroth Karl,
Kaletsch Hans
Publication year - 1987
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19871200722
Subject(s) - chemistry , methylamine , benzaldehyde , triphenyl phosphite , medicinal chemistry , organic chemistry , catalysis
1,1‐Dialkenyl‐ and 1,1‐Dialkynyl‐2,4,6‐triphenyl‐δ 5 ‐phosphnines The synthesis of 2,4,6‐triphenyl‐1,1‐bis[2‐phenyl‐( E )‐ethenyl]‐λ 5 ‐phosphinine ( 3 ) by aldol condensation of 1,1‐dimethyl‐2,4,6‐triphenyl‐λ 5 ‐phosphinine ( 1 ) with benzaldehyde is described. 1,1‐Dialkynyl‐2,4,6‐triphenyl‐λ 5 ‐phosphinines 4a,b are prepared from 1,1‐dihalo‐2,4,6‐triphenyl‐λ 5 ‐phosphinines and alkynyllithium. Addition of methylamine to 4a leads to 5 which with n ‐BuLi affords the spiro derivative 6 .