Cycloalkenyl Halide Substitution Reactions of Enantiopure Arene cis-Tetrahydrodiols with Boron, Nitrogen and Phosphorus Nucleophiles
作者:D. R. Boyd、N. D. Sharma、M. Kaik、M. Bell、M. V. Berberian、P. B. A. McIntyre、B. Kelly、C. Hardacre、P. J. Stevenson、C. C. R. Allen
DOI:10.1002/adsc.201100273
日期:2011.9
Enantiopurearene cis‐tetrahydrodiols of bromobenzene and iodobenzene have been obtained in good yields, from chemoselective hydrogenation (rhodium‐graphite) of the corresponding cis‐dihydrodiol metabolites. Palladium‐catalysed substitution of the halogen, by hydrogen, boron, nitrogen and phosphorusnucleophiles, in the acetonide derivatives, has yielded highly functionalised products for application
Chemoenzymatic synthesis of trans-dihydrodiol derivatives of monosubstituted benzenes from the corresponding cis-dihydrodiol isomers
作者:Derek R. Boyd、Narain D. Sharma、Nuria M. Llamas、Gerard P. Coen、Peter K. M. McGeehin、Christopher C. R. Allen
DOI:10.1039/b616100f
日期:——
trans-dihydrodiols involves a regioselective hydrogenation and a Mitsunobu inversion of configuration at C-2, followed by benzylic bromination and dehydrobromination steps. The method has also been extended to the synthesis of both enantiomers of the trans-dihydrodiol derivatives of toluene, through substitution of a vinylbromine atom of the corresponding trans-dihydrodiol enantiomers derived from bromobenzene
Reactions of enantiopure cyclic diols with sulfuryl chloride
作者:Derek R. Boyd、Narain D. Sharma、Magdalena Kaik、Peter B. A. McIntyre、John F. Malone、Paul J. Stevenson
DOI:10.1039/c4ob00042k
日期:——
Monocyclic allylic cis-1,2-diols reacted with sulfuryl chloride at 0 °C in a regio- and stereo-selective manner to give 2-chloro-1-sulfochloridates, which were hydrolysed to yield the corresponding trans-1,2-chlorohydrins. At −78 °C, with very slow addition of sulfuryl chloride, cyclic sulfates were formed in good yields, proved to be very reactive with nucleophiles and rapidly decomposed on attempted
Direct microbial oxidation of 2-methoxybiphenyl and 2,3-dimethoxybiphenyl by E. coli JM109 (pDTG601) furnished enantiomerically pure 3-(2-methoxyphenyl)-(1S,2R)-3,5-cyclohexadiene-1,2-diol (2) and 3-(2,3-dimethoxyphenyl)-(1S,2R)-3,5cyclohexadiene-1,2-diol (3) respectively as the only reaction products. (C) 1997 Elsevier Science Ltd.