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[求助]
a為α，b為β生物名詞實在看不懂求幫忙
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Based on these facts,Yan et al. [31] reported the microbial transformation of 3-hydroxy-5,6-cyclopropanocholestanes-an alter route to 6-methylsteroids. Incubation of 3b-hydroxy-5, 6 a -cyclopropano-5 a -cholestane (6)with Mycobacterium sp. (NRRL B-3805) gave three metabolites, 5,6 a -cyclopropano-5 a -androsta-3, 17-dione (7), 3b-hydroxy-5,6 a -cyclopropano-5 a -androsta-17-one (8) and androsta-4-ene-3,17-dione (5). Fermentation of 3b-hydroxy-5, 6b-cyclopropano-5b- cholestane (9) with Mycobacterium sp. afforded the metabolite 5,5, 6b-cyclopropano-5b-androsta-3, 17-dione (10) and 3 a -hydroxy-5, 6b-cyclopropano-5b-androsta-17-one (11). Similarly, incubationof 3b-hydroxy-5, 6 a -cyclopropano-5 a -cholest-7-ene (12) with Mycobacterium sp. yielded a mixture of side chain cleaved 17-keto steroids as the major products, viz. the cyclopropyl eliminated product 5, 5, 6 a -cyclopropano-5 a -androst-7-ene-3, 17-dione (13), 3b-hydroxy-5, 6 a -cyclopropano-5 a -androst-4-ene-17-one (14), 5, 6 a -cyclopropano-5 a -androst-8(14)-ene-3, 7, 17-trione (15), 5, 6 a -cyclopropano-5 a -androst-8-ene-3, 7, 17-trione (16) and 6 a , 7 a -cyclopropanoandrost-4-ene-3, 17-dione (17) as described in Scheme 2. a為α，b為β |
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- 翻譯EPI: 1690
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【答案】應(yīng)助回帖
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bxzc123: 金幣+100, 翻譯EPI+1, ★★★很有幫助 2015-04-23 21:21:54
bxzc123: 金幣+100, 翻譯EPI+1, ★★★很有幫助 2015-04-23 21:21:54
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Based on these facts,Yan et al. [31] reported the microbial transformation of 3-hydroxy-5,6-cyclo propano cholestane-an alter route to 6-methyl steroids. Incubation of 3β-hydroxy-5, 6 α-cyclo propano-5 α-cholestane (6)with Mycobacterium sp. (NRRL B-3805) gave three metabolites, 5,6 α-cyclo propano-5 α-androsta-3, 17-dione (7), 3β-hydroxy-5,6 α-cyclo propano-5 α-androsta-17-one (8) and androsta-4-ene-3,17-dione (5). Fermentation of 3β-hydroxy-5, 6β-cyclo propano-5β-cholestane (9) with Mycobacterium sp. afforded the metabolite 5,5, 6β-cyclo propano-5β-androsta-3, 17-dione (10) and 3 α-hydroxy-5, 6β-cyclo propano-5β-androsta-17-one (11). Similarly, incubation of 3β-hydroxy-5, 6 α-cyclo propano-5 α-cholest-7-ene (12) with Mycobacterium sp. yielded a mixture of side chain cleaved 17-keto steroids as the major products, viz. the cyclopropyl eliminated product 5, 5, 6 α-cyclo propano-5 α-androst-7-ene-3, 17-dione (13), 3β-hydroxy-5, 6α-cyclo propano-5α-androst-4-ene-17-one (14), 5, 6 α-cyclo propano-5 α-androst-8(14)-ene-3, 7, 17-trione (15), 5, 6 α-cyclo propano-5 α-androst-8-ene-3, 7, 17-trione (16) and 6α, 7α-cyclo propano androst-4-ene-3,17-dione (17) as described in Scheme 2. 基于這些事實，Yan等【[31】報道的3-羥基-5,6-環(huán)丙醇膽甾烷微生物轉(zhuǎn)化為6-甲基類固醇的不同途徑。將3β羥基5,6α-環(huán)丙醇-5α-膽甾（6）與結(jié)核分枝桿菌（NRRL B-3805）孵育，得到3個代謝產(chǎn)物：5,6-α-環(huán)丙醇-5α-雄甾3,17二酮（7），3β羥基-5,6-α-環(huán)丙醇-5α-雄17酮（8）和雄甾-4-烯-3,17-二酮（5）。3β羥基-5-，6β-環(huán)丙醇-5β-膽甾（9）與結(jié)核分枝桿菌發(fā)酵，得到代謝物5,5，6β-環(huán)丙醇-5β-雄甾3,17二酮（10）和3α羥基-5，6β-環(huán)丙醇-5β-雄甾-17-酮（11）。類似地，如方案2中所述，3β羥基5,6α-環(huán)丙醇-5α-膽甾-7-烯（12）與結(jié)核分枝桿菌孵育，得到的主要產(chǎn)物是側(cè)鏈17-酮類固醇側(cè)鏈裂解混合物，即環(huán)丙基消除產(chǎn)物5，5，6α-環(huán)丙醇-5α-雄甾-7-烯-3，17-二酮（13），3β羥基-5，6α-環(huán)丙醇-5α-雄-4-烯-17酮（14），5，6α-環(huán)丙醇-5α-雄甾-8（14）-烯-3,7，17-三酮（15），5，6α-環(huán)丙醇-5-α-雄甾-8-烯-3，7，17三酮（16）和6α，7α-環(huán)丙醇，雄-4-烯-3,17-二酮（17）。 |
2樓2015-04-22 21:25:07
3樓2015-04-23 21:22:41
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