Two routes to consecutive functionalization of 3-chloro-4-cyanobenzo[b][1,6]naphthyridine (1a) at positions 3 and 10 were developed. Oxidation of compound la with m-chloro-perbenzoic acid in acetone leads to 3-chloro-4-cyano-10-oxobenzo[b][1,6]naphthyridine, while in acetic acid, the reactiongives 3-chloro-4-cyano-10-(3-chlorobenzoyloxy)-5-hydroxy-5,10-dihydrobenzo[b][1,6]naphthyridine. The reactions of la with some C-nucleophiles give sigma-adducts at position 10. The reactions of N,N-dimethylamide acetals with chloride la leads to 4-cyano-3-dimethylaminobenzo[b][1,6]naphthyridine.
Two routes to consecutive functionalization of 3-chloro-4-cyanobenzo[b][1,6]naphthyridine (1a) at positions 3 and 10 were developed. Oxidation of compound la with m-chloro-perbenzoic acid in acetone leads to 3-chloro-4-cyano-10-oxobenzo[b][1,6]naphthyridine, while in acetic acid, the reactiongives 3-chloro-4-cyano-10-(3-chlorobenzoyloxy)-5-hydroxy-5,10-dihydrobenzo[b][1,6]naphthyridine. The reactions of la with some C-nucleophiles give sigma-adducts at position 10. The reactions of N,N-dimethylamide acetals with chloride la leads to 4-cyano-3-dimethylaminobenzo[b][1,6]naphthyridine.
作者:A. S. Ivanov、N. Z. Tugusheva、L. M. Alekseeva、V. G. Granik
DOI:10.1023/a:1024725811506
日期:——
Two routes to consecutive functionalization of 3-chloro-4-cyanobenzo[b][1,6]naphthyridine (1a) at positions 3 and 10 were developed. Oxidation of compound la with m-chloro-perbenzoic acid in acetone leads to 3-chloro-4-cyano-10-oxobenzo[b][1,6]naphthyridine, while in acetic acid, the reactiongives 3-chloro-4-cyano-10-(3-chlorobenzoyloxy)-5-hydroxy-5,10-dihydrobenzo[b][1,6]naphthyridine. The reactions of la with some C-nucleophiles give sigma-adducts at position 10. The reactions of N,N-dimethylamide acetals with chloride la leads to 4-cyano-3-dimethylaminobenzo[b][1,6]naphthyridine.