共查询到20条相似文献,搜索用时 31 毫秒
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Esterase BioH,which is obligatory for biotin synthesis in Escherichia coli,was found to exhibit a promiscuous ability to catalyse Aldol and Knoevenagel reactions with moderate to good yields.The reaction conditions including organic solvent,molar ratio of ketone to aldehyde,enzyme amount,and reaction time were investigated to evaluate the effect of different reaction conditions on yield.Target compounds were afforded in the best yield of 91.2% for Aldol reaction and 54.7% for Knoevenagel reaction.In addition,because the enzyme could be prepared with a low cost,this protocol could provide an economic route to conduct Aldol and Knoevenagel reactions,which expand the field of enzymatic promiscuity. 相似文献
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H. R. Proeter 《Analytical and bioanalytical chemistry》1874,13(1):326-326
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Werther 《Analytical and bioanalytical chemistry》1862,1(1):72-72
Analytical and Bioanalytical Chemistry - 相似文献
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Ritthausen 《Analytical and bioanalytical chemistry》1868,7(1):266-266
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K. Calmberg 《Fresenius' Journal of Analytical Chemistry》1875,14(1):373-374
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A. W. Hofmann 《Fresenius' Journal of Analytical Chemistry》1871,10(1):225-226
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A vector-fiber bundle structure of the reaction path Hamiltonian, which has been introduced by Miller, Handy and Adams, is explored with respect to molecular vibrations orthogonal to the reaction path. The symmetry of the fiber bundle is characterized by the real orthogonal group O(3N- 7) for the dynamical system with N atoms. Under the action of group O(3N- 7). the kinetic energy of the reaction path Hamiltonian is left invariant. Furthermore , the invariant behaviour of the Hamiltonian vector fields is investigated. 相似文献
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ZHANG Jing-wen ZHANG Xiao-long MA Xiu-li LIU Chang-cheng MU Ying SUN Yun-xiu JIANG Wen-pu HUANG Hua-min LI Yao-xian PENG Wan-ru 《高等学校化学研究》1998,14(1):38-41
StudiesonEsterExchangeReactionZHANGJing-wen,ZHANGXiao-long,MAXiu-li,LIUChang-cheng,MUYing,SUNYun-xiu,JIANGWen-pu,HUANGHua-min... 相似文献
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Analytical and Bioanalytical Chemistry - 相似文献
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