ISSN:
0009-2940
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
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(1H,3H)-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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19811140731