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Phosphanalkylene, 54 [1a] . Kumulierte ylide, 21 [1b] . Ein neuer weg zu N ‐substituierten (triphenylphosphoranyliden)keteniminen
Author(s) -
Bestmann Hans Jürgen,
Hotz Michael,
Witschel Matthias,
Roth Dieter
Publication year - 1993
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.19931260929
Subject(s) - chemistry , ylide , phosphonium , medicinal chemistry , amide , trimethylsilyl , stereochemistry , organic chemistry
Phosphane Alkylenes, 54 [1a] . – Cumulated Ylides, 21 [1b] . – A New Way to N ‐Substituted (Triphenylphosphoranylidene)‐ketenimines Reaction of methylenetriphenylphosphorane ( 1 ) with isothiocyanates 5 leads to ylides 6B , which can be methylated at the S atom to give the phosphonium salts 8 . Treatment of 8 with sodium methanolate gives rise to formation of the phosphoranes 10 , which on treatment with sodium bis(trimethylsilyl)‐amide undergo β‐elimination to form the N ‐substituted (tri‐phenylphosphoranylidene)ketenimines 3 .