Synthesis of the Bretonins, Polyolefinic Esterified Glyceryl Ethers of an Unidentified Sponge from the North-Brittany Sea: Absolute Configuration and Novel Structure Assignment
作者:Ines Mancini、Graziano Guella、Francesco Pietra
DOI:10.1002/hlca.19910740504
日期:1991.8.7
obtained from the condensation of commerical (−)-(R)-2,2-dimethyl-1,3-dioxolan-4-yl p-toluenesuifonate ((−)-(R)-15) with a mixture of (4E,6E,8E)- (14e) and (4E,6Z,8E)-dodeca-4,6,8-trien-1-ol (14z). This also allowed confirming the structure and configuration of bretonin B (= (S)-2-[(4E,6Z,8E)-dodeca-4,6,8-trienyl]oxy}-1-(hydroxy-methyl)ethyl 4-hydroxybenzoate; 3) which was also isolated from the same
的绝对构型乙酰bretonin A(=(+} - ([R )- 1 - [(乙酰氧基)甲基] -2- - [(4E,6 E,8 E) -十二碳-4,6,8-三烯基]氧} 4-乙酰氧基苯甲酸乙酯;(-)- 1b)和异丁酮A(=(+)-(S)-3-[(4 E,6 E,8 E)-do-deca-4,6,8 -三烯基]氧基} -2-羟丙基4-羟基苯甲酸酯;(+)-2)先前是从北布列塔尼海未定海绵中分离的,通过与合成的(+)- lb和(+)- 2进行比较而建立,是由(-)-(R)-2,2-二甲基-1,3-二氧戊环-4-基对甲苯磺酸酯((-)-(R)-15)与(4)的混合物缩合而得E,6 E,8 E)-(14e)和(4 E,6 Z,8 E)-dodeca-4,6,8-trien-1-ol(14z)。这也使得可以确认布雷顿丁素B(=(S)-2 -[(4 E,6 Z,8 E)-dodeca-4,6,8-三烯基]氧基}