Enzymatic Desymmetrization of meso-2,6-Dimethyl-1,7-heptanediol. Enantioselective Formal Synthesis of the Vitamin E Side Chain and the Insect Pheromone Tribolure
摘要:
The chiral syn-1,5-dimethylalkyl subunit is found in many natural products with significant biological activities. Enzymatic esterification of meso-2,6-dimethyl-1,7-heptanediol with isopropenyl acetate in the presence of Pseudomonas cepacia lipase in organic medium provided the chiral nonracemic monoester in high enantiomeric excess (ee = 95%). This chiral building block was used in the formal syntheses of vitamin E side chain and the insect pheromone tribolure.
Acyclic stereoselection. 15. Sequential aldol-claisen as a method for 1,5-stereoselection. Total synthesis of the vitamin-E side chain
作者:Clayton H. Heathcock、Esa T. Jarvi
DOI:10.1016/s0040-4039(00)88423-3
日期:1982.1
Alcohol1, the side chain of α-tocopherol, has been synthesized in a stereoselective route involving an aldol condensation-Claisen rearrangement sequence. The synthesis require 11 steps and produces1in 17% overall yield. A complementary sequence employing reagent14provides isomer18.
Acyclic stereoselection. Part 42. 1,4- and 1,5-Stereoselection by sequential aldol addition to a .alpha.,.beta.-unsaturated aldehydes followed by Claisen rearrangement. Application to total synthesis of the vitamin E side chain and the archaebacterial C40 diol
作者:Clayton H. Heathcock、Bruce L. Finkelstein、Esa T. Jarvi、Peggy A. Radel、Cheri R. Hadley
DOI:10.1021/jo00244a017
日期:1988.4
Berube; Deslongchamps, Bulletin de la Societe Chimique de France, 1987, vol. No. 1, # 1, p. 103 - 115
作者:Berube、Deslongchamps
DOI:——
日期:——
HEATHCOCK, CLAYTON H.;FINKELSTEIN, BRUCE L.;JARVI, ESA T.;RADEL, PEGGY A.+, J. ORG. CHEM., 53,(1988) N 9, 1922-1942
作者:HEATHCOCK, CLAYTON H.、FINKELSTEIN, BRUCE L.、JARVI, ESA T.、RADEL, PEGGY A.+