Investigation of the importance of the C-2 and C-13 oxygen functions in the transformation of stemodin analogues by Rhizopus oryzae ATCC 11145
摘要:
Incubation of 2alpha,13(R)-dihydroxystemodane (3) with Rhizopus oryzae ATCC 11145 gave 2alpha,7beta,13(R)-trihydroxystemodane (11) while biotransformation of 13(R)-hydroxystemodan-2-one (5) yielded 6alpha,13(R)-dihydroxystemodan-2-one (12) and 7beta,13(R)-dihydroxystemodan-2-one (13). Bioconversion of 2beta,13(R)-dihydroxystemodane (7) with Rhizopus afforded 2beta,7,13(R)-trihydroxystemodane (14). The results complement data from our previous work and provide more information about the effect of functional groups of stemodane substrates on the site of hydroxylation. (C) 2004 Elsevier Ltd. All rights reserved.
Investigation of the importance of the C-2 oxygen function in the transformation of stemodin analogues by Rhizopus oryzae ATCC 11145
摘要:
A new stemodinoside, stemodin-a-L-arabinofuranoside (5), was isolated from the plant Stemodia maritima. Incubation of stemodin (2) with Rhizopus oryzae ATCC 11145 gave 2alpha,7beta,13(S)-trihydroxystemodane (17) and 2alpha,3beta,13(S),16alpha-tetrahydroxystemodane (18) whilst stemodinone (8) afforded 6alpha,13(S)-dihydroxystemodan-2-one (19). The bioconversion of 2beta,13(S)-dihydroxystemodane (10) by the fungus yielded 2beta,7beta,13(S)-trihydroxystemodane (20) whereas stemod-12-en-2-one (9) provided 7beta,17-dihydroxystemod-12-en-2-one (21). The results provide useful information about the relationship between the functional groups of the substrates and their potential for bioconversion. (C) 2004 Elsevier Ltd. All rights reserved.
Investigation of the importance of the C-2 oxygen function in the transformation of stemodin analogues by Rhizopus oryzae ATCC 11145
作者:Glenroy D.A. Martin、William F. Reynolds、Paul B. Reese
DOI:10.1016/j.phytochem.2004.01.011
日期:2004.3
A new stemodinoside, stemodin-a-L-arabinofuranoside (5), was isolated from the plant Stemodia maritima. Incubation of stemodin (2) with Rhizopus oryzae ATCC 11145 gave 2alpha,7beta,13(S)-trihydroxystemodane (17) and 2alpha,3beta,13(S),16alpha-tetrahydroxystemodane (18) whilst stemodinone (8) afforded 6alpha,13(S)-dihydroxystemodan-2-one (19). The bioconversion of 2beta,13(S)-dihydroxystemodane (10) by the fungus yielded 2beta,7beta,13(S)-trihydroxystemodane (20) whereas stemod-12-en-2-one (9) provided 7beta,17-dihydroxystemod-12-en-2-one (21). The results provide useful information about the relationship between the functional groups of the substrates and their potential for bioconversion. (C) 2004 Elsevier Ltd. All rights reserved.
Investigation of the importance of the C-2 and C-13 oxygen functions in the transformation of stemodin analogues by Rhizopus oryzae ATCC 11145
作者:G MARTIN
DOI:10.1016/j.phytochem.2004.05.016
日期:2004.8
Incubation of 2alpha,13(R)-dihydroxystemodane (3) with Rhizopus oryzae ATCC 11145 gave 2alpha,7beta,13(R)-trihydroxystemodane (11) while biotransformation of 13(R)-hydroxystemodan-2-one (5) yielded 6alpha,13(R)-dihydroxystemodan-2-one (12) and 7beta,13(R)-dihydroxystemodan-2-one (13). Bioconversion of 2beta,13(R)-dihydroxystemodane (7) with Rhizopus afforded 2beta,7,13(R)-trihydroxystemodane (14). The results complement data from our previous work and provide more information about the effect of functional groups of stemodane substrates on the site of hydroxylation. (C) 2004 Elsevier Ltd. All rights reserved.