Highly Stereoselective 1,4-Addition of the Enolate Generated from 6-Deoxy-<scp>d</scp>-Glucopyranoside-Derived Propionyl Ester to Methyl Crotonate: Application to Total Synthesis of (-)-Lasiol
1,4-Addition of the enolate generated from methyl 6-deoxy-2,3-di-O-(t-butyldimethylsilyl)-4-O-propionyl-α-D-glucopyranoside to methyl crotonate provided a single anti-adduct with exceptionally high stereoselectivity. Fromthis adduct, (-)-lasiol, an acyclic monoterpene alcohol isolated from the males of Lasius meridionalis ants, was synthesized concisely.
6-脱氧-2,3-二-O-(叔丁基二甲基甲硅烷基)-4-O-丙酰基-α-D-吡喃葡萄糖苷甲酯生成的烯醇1,4-加成到巴豆酸甲酯提供了一种单一的抗加合物极高的立体选择性。从此加合物中,简明地合成了 (-)-lasiol,一种从 Lasius meridionalis 蚂蚁雄性中分离出来的无环单萜醇。
Synthesis of optically active forms of faranal, the trail pheromone of Pharaoh's ant
作者:Kenji Mori、Hiraki Ueda
DOI:10.1016/0040-4020(82)85108-9
日期:1982.1
Both (3S,4R)-(+)- and (3R,4S)-(−)-enantiomers of faranal [(6E,10Z)-3,4,7,11-tetramethyl-6,10-tride- cadienal] were synthesized. The former was comparable in bioactivity with that of the natural trail pheromone isolated from Monomorium pharaonis.
Asymmetric Conjugate Addition of Crotylstannane: Synthesis of (-)-Lasiol
作者:Richard Mullins、Emily Wilding、John Gregg
DOI:10.1055/s-0029-1219381
日期:2010.3
the primary sexattractant of the male ant, Lasius meridionalis. Our interest in lasiol stems from the stereochemistry of the chiral methyl substituents and the synthetic challenges posed by this common structural motif. As such, an asymmetric 1,4-conjugate addition of an allylic stannane to produce the 1,2-anti-dimethyl arrangement with high stereocontrol has resulted in the synthesis of (-)-lasiol