ISSN:
0009-2940
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Reactions of Cyclobutenediones, XLII: Reactions of Diphenylcyclobutenedione with MethylenephosphoranesDiphenylcylobutenedione (1a) reacts with the methylenephosphoranes 4a-z to give the substituted 4-methylene-2,3-diphenyl-2-cyclobuten-1-ones 5a-p, t-z and 5u′-z. Structural proof of the products is given by spectroscopic methods. The unsubstituted compound 5r is not obtained. Wittig reaction of (2,5-dimethoxyphenyl)phenylcyclobutenedione (1d) with 4u proceeds nearly stereoselectively to give 9D.
Notes:
Diphenylcyclobutendion (1a) reagiert mit den Methylenphosphoranen 4a-z zu substituierten 4-Methylen-2,3-diphenyl-2-cyclobuten-1onen 5a-p, t-z bzw. 5u′-z, deren Struktur spektroskopisch gesichert wird. Die Synthese des Grundkörpers 5r gelingt nicht. Die Wittig-Reaktion am (2,5-Dimethoxyphenyl) phenylcyclobutendion (1d) mit 4u verläuft annähernd stereoselektiv zu 9D.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19761090437
