No abstract

No abstract

Wittig-Homer reagent l a reacts with 2-nitroso-I-naphthol 3 to give the olefinic adduct 5, the alkylated product 4 and the dimeric compound 6. When 2-nitroso-I-naphthol 3 reacts with Wittig-Homer reagents 1b.c. the corresponding phosphonate adducts 8a.b together with compounds 4 and 6 were obtained. Oxovinylidenetriphenylphosphorane 2 reacts with 3 to give the corresponding phosphoranylidenecyclobutylidene adduct 10 and triphenylphosphine oxide. The structural assignnlents of the new products are based on compatible analytical and spectroscopic results.Keywords: Wittig-Homer reagents (I-); phosphacumulene (2); 2-nitroso-1-naphthol 3; 'Ihe alkylaled product 4; the olefinic adducts 5; the dimeric product 6; the phosphonate adducts 8a, band the phosphonnylidene cyclobutylidene adduct 10

Several pyrido[2,3-e]pyrimidine fused with other rings have been prepared by intramolecular cyclization

No abstract