Preparation and Intramolecular Cyclization of Bis (carbodiimides). Synthesis and X-ray Structure of 1, 3-Diazetidine-2, 4-diimine Derivatives

M Alajarín, P Molina, P Sánchez-Andrada…

Index: Alajarin; Molina; Sanchez-Andrada; Foces-Foces Journal of Organic Chemistry, 1999 , vol. 64, # 4 p. 1121 - 1130

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Citation Number: 20

Abstract

Aza-Wittig reactions of bis (iminophosphorane) 1 derived from 2, 2'-diazidobiphenyl with aromatic isocyanates provided dibenzo [d, f]-1, 3-diazetidino [1, 2-a] diazepine derivatives 2 in moderate yields. Similar results can be achieved from the reaction of 2, 2'-bis (isothiocyanato) biphenyl 4 with aryliminophosphoranes. Treatment of bis (isothiocyanate) 4 with arylamines and further dehydrosulfurization of the resulting bis (thioureas) leads to ...

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