(+)-和(-)-苯并[a] re7,8-氧化物:合成,绝对立体化学和与苯并[ a ] py其他哺乳动物代谢物的立体化学相关性
摘要:
从分离的反式-8-溴-7-薄荷氧基乙酰氧基-7,8,9,10-四氢苯并的非对映异构体合成了(+)-和(-)-苯并[ a ] re7,8-氧化物的光学纯样品[ a ]。后者的分离是通过短柱色谱-重结晶或高压液相色谱进行的。通过X射线晶体结构分析,将(+)-反式-8-溴-7-薄荷氧基乙酰氧基-7,8,9,10-四氢苯并[ a ] py的绝对立体化学定为(7 S,8 S)。; 反过来,这种结构已经明确地与(7 S,8 R)-(-)-苯并[ a ] py 7,8-氧化物和一系列哺乳动物代谢产物。
(+)-和(-)-苯并[a] re7,8-氧化物:合成,绝对立体化学和与苯并[ a ] py其他哺乳动物代谢物的立体化学相关性
摘要:
从分离的反式-8-溴-7-薄荷氧基乙酰氧基-7,8,9,10-四氢苯并的非对映异构体合成了(+)-和(-)-苯并[ a ] re7,8-氧化物的光学纯样品[ a ]。后者的分离是通过短柱色谱-重结晶或高压液相色谱进行的。通过X射线晶体结构分析,将(+)-反式-8-溴-7-薄荷氧基乙酰氧基-7,8,9,10-四氢苯并[ a ] py的绝对立体化学定为(7 S,8 S)。; 反过来,这种结构已经明确地与(7 S,8 R)-(-)-苯并[ a ] py 7,8-氧化物和一系列哺乳动物代谢产物。
Synthesis and catalytic reactivity of D4-symmetric dinorbornabenzene-derived metallotetraarylporphyrins
作者:Ronald L. Halterman、Shyi-Tai Jan、Heather L. Nimmons、David J. Standlee、Masood A. Khan
DOI:10.1016/s0040-4020(97)00729-1
日期:1997.8
D4-symmetry. The resolved benzaldehyde was synthesized in seven steps from p-benzoquinone and cyclopentadiene and included a resolution via diastereomeric ketals. A manganese chloride complex of porphyrin 1 was used as a catalyst for the asymmetric epoxidation of aromatic substituted alkenes in the presence of excess sodiumhypochlorite in up to 7,200 turnovers and up to 76% e.e and >90% yield.
Enantioselective synthesis of the tumorigenic anti-diol epoxide metabolites of benzo[a]pyrene
作者:Ronald G. Harvey、Xiao-Qing Tang
DOI:10.1016/0040-4039(95)00385-p
日期:1995.4
Efficient, highly enantioselective syntheses of (+) and (−)-anti-benzo[a]pyrene diol epoxide (BPDE) from 9,10-dihydrobenzo[a]pyrene are described. Initial epoxidation catalyzed by (salen) Mn(III) complex gives 7,8-epoxy-7,8,9,10-tetrahydrobenzo[a]pyrene (>90% ee). Acid-catalyzed hydration occurs regio- and stereo-selectively to furnish the trans-tetrahydrodiols which are converted into the optically
Enantioselective synthesis of the (+)-anti-7,8-dihydrodiol-9,10-epoxide of the potent carcinogen benzo[a]pyrene
作者:Xiaoming Huang、Thomas M. Harris
DOI:10.1039/c39950001699
日期:——
The title compound, the most important genotoxic metabolite of benzo[a]pyrene, has been prepared efficiently in a synthesis which capitalized on Jacobsen-type enantioselective epoxidation of 9,10-dihydrobenzo[a]pyrene, cleavage of the epoxide by KOH–Me2SO to give the tetrahydro-trans-7,8-diol, and formation of the dibenzoate from which the contaminating antipode was removed by crystallization.
BOYD D. R.; GADAGINAMATH G. S.; HAMILTON R., TETRAHEDRON LETT., 1978, NO 28, 2487-2490
作者:BOYD D. R.、 GADAGINAMATH G. S.、 HAMILTON R.
DOI:——
日期:——
(+)- and (–)-Benzo[a]pyrene 7,8-oxide : synthesis, absolute stereochemistry, and stereochemical correlation with other mammalian metabolites of benzo[a]pyrene
作者:Derek R. Boyd、Guru S. Gadaginamath、Anil Kher、John F. Malone、Haruhiko Yagi、Donald M. Jerina
DOI:10.1039/p19800002112
日期:——
Optically pure samples of (+)- and (–)-benzo[a]pyrene 7,8-oxide have been synthesized from the separated diastereoisomers of trans-8-bromo-7-menthyloxyacetoxy-7,8,9,10-tetrahydrobenzo[a]pyrene. The latter separation was effected by short-column chromatography–recrystallization or high pressure liquid chromatography. The absolute stereochemistry of (+)-trans-8-bromo-7-menthyloxyacetoxy-7,8,9,10-tet
从分离的反式-8-溴-7-薄荷氧基乙酰氧基-7,8,9,10-四氢苯并的非对映异构体合成了(+)-和(-)-苯并[ a ] re7,8-氧化物的光学纯样品[ a ]。后者的分离是通过短柱色谱-重结晶或高压液相色谱进行的。通过X射线晶体结构分析,将(+)-反式-8-溴-7-薄荷氧基乙酰氧基-7,8,9,10-四氢苯并[ a ] py的绝对立体化学定为(7 S,8 S)。; 反过来,这种结构已经明确地与(7 S,8 R)-(-)-苯并[ a ] py 7,8-氧化物和一系列哺乳动物代谢产物。