Total synthesis of prolycopene, a novel 7,9,7′,9′-tetra-cis(Z) carotenoid and main pigment of the tangerine tomato Lycopersicon esculentum
作者:Gerald Pattenden、David C. Robson
DOI:10.1016/j.tet.2006.05.023
日期:2006.7
A totalsynthesis of the 7,9,7′,9′-tetra-cis(Z) isomer of lycopene, also known as ‘prolycopene’, produced as the major carotenoid pigment in fruits of the tangerine tomato Lycopersicon esculentum (‘Tangella’) is described. The synthesis is based on: (i) a modified Sonogashira coupling reaction between the E-alkenyl bromide 6 and the Z-enynol 7, leading to the 2Z-trienynol 8, followed by (ii) a Wittig
A total synthesis of the tetra-Z-isomer (1, ‘prolycopene’) of lycopene found in fruits of the Tangerine tomatoLycopersicon esculentum, based on: (i) elaboration of the2Z, 6E-carbinol (4) from a Pd-coupling reaction between the vinyl bromide (2) and the Z-enynol(3) (ii) successive Wittig reactions between (6) and (7), [leading to (8)] and between (8) and (6), and (iii) partial catalytic hydrogenation