ChemInform Abstract: Novel Synthesis of 2,2‐Dialkyl‐3‐dialkylamino‐2,3‐dihydro‐1H‐naphtho[2,1‐b]pyrans.

Abstract

Benzopyran derivatives R 0350Novel Synthesis of 2,2-Dialkyl-3-dialkylamino-2,3-dihydro-1H-naphtho[2,1-b]pyrans. -The acid-catalyzed three-component reaction involves the retro-aldol formation of formaldehyde. This is confirmed by an analogous synthesis of title compound (XII) via a four-component reaction. -(HUANG, P.-J. J.; CAMERON, T. S.; JHA*, A.; Tetrahedron Lett. 50 (2009) 1, 51-54; Dep. Chem., Acadia Univ., Wolfville, Nova Scotia B4P 2R6, Can.; Eng.) -Mais 14-138