M. Cornia et al., SHORT SYNTHESIS OF CHIRAL TENTACLED PORPHYRINS USING PYRROLYLMAGNESIUMBROMIDE AND (3R)-(-CITRONELLAL()), Tetrahedron : asymmetry, 8(17), 1997, pp. 2885-2887
The reaction between pyrrolyrmagnesiumbromide and (3R)-(+)-citronellal
produced porphyrin 1 with four chains at the meso carbons, each one b
earing a stereogenic centre at C-2 and a double bond at C-5. '-Fluoro-
phenyldipyrryl-methanebismagnesiumbromide 4 with (3R)-(+)-citronellal
gave rise to porphyrin 2 with two stereogenic chains. (C) 1997 Publish
ed by Elsevier Science Ltd.