A synthesis of (−)-tetrahydrolipstatin in which the relative stereochemistry is controlled by a phenyldimethylsilyl group
作者:Ian Fleming、Nicholas J. Lawrence
DOI:10.1016/s0040-4039(00)94466-6
日期:1990.1
The alkylation ofa β-silylenolate and the hydroboration of an allylsilane successively control the relative stereochemistry of the three stereogenic centres on the carbon backbone in a synthesis of the esterase inhibitor tetrahydrolipstatin (21).
FLEMING, IAN;LAWRENCE, NICHOLAS J., TETRAHEDRON LETT., 31,(1990) N5, C. 3645-3648
作者:FLEMING, IAN、LAWRENCE, NICHOLAS J.
DOI:——
日期:——
Compatibility Studies of Dimethyl(phenyl)silyl Group as a Masked Hydroxyl Group in Compounds Containing Cyclopropane Rings and in Compounds Containing the Enone Functionality
作者:Noorsaadah Abd. Rahman、Ian Fleming
DOI:10.1080/00397919308011254
日期:1993.6
phenyl(dimethyl)silyl group as a maskedhydroxylgroup in the presence of cyclopropane rings and the enone functionality was studied. The result showed that conditions for the silyl-to-hydroxyl group conversion is not compatible with cyclopropane rings. However, under a modified two-step transformation procedure, the silyl group is converted to a hydroxylgroup in the presence of an enone group without
Stereocontrol in organic synthesis using silicon-containing compounds. A synthesis of (−)-tetrahydrolipstatin using the alkylation of a β-silyl ester and the hydroboration of an allylsilane
作者:Ian Fleming、Nicholas J. Lawrence
DOI:10.1039/a804275f
日期:——
5S)-5-benzyloxy-3-dimethyl(phenyl)silyl-2-hexylhexadecanoic acid 19. Silyl-to-hydroxy conversion, β-lactone formation, and hydrogenolysis gave the known alcohol (3S,4S)-3-hexyl-4-[(S)-2′-hydroxytridecyl]oxetan-2-one 22, from which tetrahydrolipstatin 1 was prepared by a conventional esterification. Each of the stereochemistry determining steps, 4 → Z-6, 7 → E-8, E-8 → Z-9, Z-6 + Z-10 → Z-12, Z-13a → Z-14a and Z-15 → 16