Selective methylation of kaempferol via benzylation and deacetylation of kaempferol acetates.
Selective methylation of kaempferol via benzylation and deacetylation of kaempferol acetates.
复制标题
通过山奈酚乙酸酯的苄基化和脱乙酰化选择性甲基化山奈酚
DOI:
10.3762/bjoc.11.33
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发表时间:
2015
影响因子:
2.7
通讯作者:
Zhang G
中科院分区:
文献类型:
--
作者:
Mei Q;Wang C;Yuan W;Zhang G
A strategy for selective mono-, di- and tri-O-methylation of kaempferol, predominantly on the basis of selective benzylation and controllable deacetylation of kaempferol acetates, was developed. From the selective deacetylation and benzylation of kaempferol tetraacetate (1), 3,4′,5,-tri-O-acetylkaempferol (2) and 7-O-benzyl-3,4′5,-tri-O-acetylkaempferol (8) were obtained, respectively. By controllable deacetylation and followed selective or direct methylation of these two intermediates, eight O-methylated kaempferols were prepared with 51–77% total yields from kaempferol.
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影响因子:
2.6
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通讯作者:
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影响因子:
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