Biosynthese der Verrucarine und Roridine. Teil 5. Synthese von zwei Diastereoisomerenpaaren des [1,8-<sup>14</sup>C]-α-Bisabolols und Versuche zu deren Einbau in Verrucarol Verrucarine und Roridine, 32. Mitteilung [1]
作者:Waltraut Knöll、Christoph Tamm
DOI:10.1002/hlca.19750580418
日期:1975.4.23
The diastereoisomeric (+)-[1,8-14C]-(1'R,6R, S)-α-bisabolol (2a) and (−)-[1,8-14C]-(1′S, 6R, S)-α-bisabolol (2b) were synthesized by reaction of the Grignard compound of [1,6-14C]-5-bromo-2-methyl-2-pentene (12) with (+)-(R)- and (−)-(S)-4-acetyl-1-methyl-1-cyclohexene, (6a) and (6b) respectively. For the preparation of compound 12, cyclopropyl methyl ketone was treated with [14C]-methyl magnesium
非对映体(+) - [1,8-二氮杂14 C] - (1' - [R,6 - [R,S)-α-红没药醇(2A)和( - ) - [1,8-二氮杂14 C] - (1'S ,6R,S)-α-红没药醇(2B)由的反应合成的格氏化合物[1,6- 14 C] -5-溴-2-甲基-2-戊烯(12)与(+) - ( R)-和(-)-(S)-4-乙酰基-1-甲基-1-环己烯分别为(6a)和(6b)。为了制备化合物12,将环丙基甲基酮用[ 14 C]-甲基碘化镁处理以形成甲醇11,将其通过HBr裂解。由(+)-(R)-和(-)-(S)-柠檬烯合成化合物6a和6b,通过导数5a,6a和5b,6b分别如图4a)和(4b)所示。-该合成建立了天然α-bisabolols的C(1')的绝对构型:(R)为(+)-α-bisabolol,(S)为(-)-α-bisabolol。-用肉毒杆菌和放射性(+)-(1'R,6