[2 + 2] Cycloadducts from isocyanates and azaphospholes
Abstract
Methyl isocyanate adds with its CN group to the P
N group of 1,2λ5-azaphospholes and -azaphospholines; depending on the nature of the ring and the phosphorus substituents the bicyclic adducts are stable or redissociate in solution or/and decompose in a Wittig-type reaction.