Calixarenes. 40. Arylmethylenation of p-(Cyanomethyl)calixarene

Article abstract of DOI:10.1021/jo00099a038

Treatment of tetra-O-substituted p-(cyanomethyl)calix<4>arenes 3 and 6 with aromatic aldehydes yields aldol product resulting from condensation at the carbons α to the cyano groups.The products 4 from the tetra-O-benzyl compound 3 retain the benzyl groups