Kumulierte Ylide, XI. Umsetzung von Isocyanaten und Isothiocyanaten mit (2,2‐Diethoxyvinyliden)triphenylphosphoran | Zendy

Bestmann Hans Jürgen | Zendy; Saalfrank Rolf W. | Zendy

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Kumulierte Ylide, XI. Umsetzung von Isocyanaten und Isothiocyanaten mit (2,2‐Diethoxyvinyliden)triphenylphosphoran

Author(s) -

Bestmann Hans Jürgen,

Saalfrank Rolf W.

Publication year - 1981

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.19811140731

Subject(s) - chemistry , ylide , acetal , medicinal chemistry , acetic acid , boiling , organic chemistry

Cumulated Ylides, XI. Reaction of Isocyanates and Isothiocyanates with (2,2‐Diethoxyvinylidene)triphenylphosphorane (2,2‐Diethoxyvinylidene)triphenylphosphorane (8) reacts with isocyanates and isothiocyanates 1 to give 1,3‐disubstituted 6,6‐diethoxy‐5,6‐dihydro‐5‐(triphenylphosphoranylidene)‐2,4(1 H ,3 H )‐pyrimidinediones and ‐dithiones 13 , respectively. By boiling in acetic acid the acetal group of 13 is cleaved with formation of the corresponding 6‐oxo derivatives 14.

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