123195-64-2

Upstream product

• 591-20-8 3-Bromophenol 
• 67373-56-2 chlorodimethyl(1,1,2-trimethylpropyl)silane 

Downstream Products

• 127974-73-6 (+)-(2S,3S,4R)-2-(Benzyloxy)-3-<<4-(benzyloxy)-3-methoxyphenyl>bis(phenylthio)methyl>-4-<3-<oxy>benzoyl>tetrahydrofuran 
• 123195-59-5 (-)-(2R)-2-(Benzyloxy)-2,5-dihydro-4-<3-<oxy>benzoyl>furan 

Relevant academic research and scientific papers

7-oxabicycloheptyl substituted heterocyclic amide or ester prostaglandin analogs useful in the treatment of thrombotic and vasospastic disease

7-Oxabicycloheptane substituted prostaglandin analogs useful in treating thrombotic and vasopastic disease have the structural formula STR1 wherein m is 1, 2 or 3; n is 1, 2, 3 or 4; Z is --(CH2)2 --, --CH=CH-- or STR2 wherein Y is O, a single bond or vinyl, with the proviso that when n is 0, if Z is STR3 then Y cannot be O, and Z is --CH=CH--, n is 1, 2, 3 or 4; and when Y=vinyl, n=0; R is CO2 H, CO2 lower alkyl, CH2 OH, CO2 alkali metal, CONHSOR3, CONHR3a or --CH2 --5-tetrazolyl, X is O, S or NH; and where R1, R2, R3 and R3a are as defined herein.

General Conjugate-Addition Method for the Synthesis of Enantiomerically Pure Lignans. Total Synthesis of (-)- and (+)-Burseran, (-)-Dehydroxycubebin, (-)-Trichostin, (-)-Cubebin, (-)-5''-Methoxyhinokinin, and (-)-Hinokinin

Conjugate addition of benzylic diphenyldithioacetal anions to enantiomerically pure (-)-(2R)-and (+)-(2S)-(benzyloxy)-2,5-dihydro-4-furan (2 r and 2 s) gave complete lignan skeletons of the dibenzylbutane class.Desulfurization followed by hydrogenolysis and, when appropriate, oxidation gave the title enantiomerically pure > 99 percent ee) lignans 45 - 50 in 24 - 35 percent overall yields from 2 r and 2 s.