Method for modifying polyfumaric acid diester
    6.
    发明授权
    Method for modifying polyfumaric acid diester 失效
    聚富马酸二酯改性方法

    公开(公告)号:US4670520A

    公开(公告)日:1987-06-02

    申请号:US823225

    申请日:1986-01-28

    CPC分类号: C08F8/00 C08F8/12

    摘要: According to the invention, a method for modifying a polyfumaric acid diester is provided. The method comprises subjecting the polyfumaric acid diester to thermal treatment to thereby obtain a polyfumarate having carboxyl groups. The polyfumaric acid diester is obtained by polymerizing a fumaric acid diester represented by the following general formula of: ##STR1## wherein R represents an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms or an organic residue having at least one aromatic ring.

    摘要翻译: 根据本发明,提供了一种改性聚富马酸二酯的方法。 该方法包括使聚富马酸二酯进行热处理,从而得到具有羧基的聚富马酸盐。 聚富马酸二酯是通过聚合由以下通式表示的富马酸二酯得到的:其中R表示碳原子数1〜12的烷基,碳原子数3〜12的环烷基或具有碳原子数3〜12的有机残基, 至少一个芳香环。

    Process for performing retro-aldol reaction
    9.
    发明授权
    Process for performing retro-aldol reaction 失效
    进行醛缩醇反应的方法

    公开(公告)号:US5677423A

    公开(公告)日:1997-10-14

    申请号:US763584

    申请日:1996-12-10

    摘要: A process for removing .beta.-hydroxy groups from .beta.-hydroxy-containing compounds is disclosed. The process involves the use of a retro-aldol-promoting reagent selected from the group of trimethylamine-N-oxide, triethylamine-N-oxide, trimethylamine-N-oxide-hydrate, and trimethylamine-hydrate and requires dissolution of the substrate in an aprotic solvent and reaction under elevated temperatures. The process is broadly applicable to a variety of substrates including complex cyclic peptides, linear peptides, and non-peptides.

    摘要翻译: 公开了从含β-羟基的化合物中除去β-羟基的方法。 该方法包括使用选自三甲胺-N-氧化物,三乙胺-N-氧化物,三甲胺-N-氧化物 - 水合物和三甲胺水合物的反醛醇醇促进剂,并且需要将基质溶解在 非质子溶剂和在升高的温度下反应。 该方法广泛适用于各种底物,包括复合环肽,线性肽和非肽。