E. Brenna et al., RECENT PROGRESS ON THE ITERATIVE CONSTRUCTION OF 4-SUBSTITUTED-3-HYDROXY BENZOIC-ACIDS FROM UNSATURATED ALDEHYDES AND DIMETHYL SUCCINATE, Tetrahedron, 53(44), 1997, pp. 15029-15040
An improvement of a known two step cyclization procedure affording 4-a
ryl-3-hydroxy benzoic acid derivatives from 3-aryl-2,3-unsaturated ald
ehydes and dimethyl succinate is described. The high versatility of th
e synthetic procedure is shown as the aryl substituent can be a benzen
e or naphthalene moiety or an heteroaromatic ring. It can be applied i
teratively to prepare p,p-oligophehyl derivatives. (C) 1997 Elsevier S
cience Ltd.