Esterification of Maleamic Acids without Double Bond Isomerization
作者:Albert Sánchez、Enrique Pedroso、Anna Grandas
DOI:10.1002/ejoc.200901365
日期:2010.5
Activation of the carboxylic acid group of a maleamic acid by treatment with an arenesulfonyl chloride followed by addition of an alcohol affords a fumaramate or a maleamate, depending on the reaction conditions. The E isomer is obtained when the acid is treated with nearly equimolar amounts of 2,4,6-triisopropylbenzenesulfonyl chloride and an alcohol in pyridine. Replacement of pyridine by 2-picoline
根据反应条件,通过用芳烃磺酰氯处理然后加入醇来活化马来酰胺酸的羧酸基团,得到富马酸酯或马来酸酯。当酸用接近等摩尔量的 2,4,6-三异丙基苯磺酰氯和醇在吡啶中处理时获得 E 异构体。用 2-甲基吡啶替代吡啶并使用大量过量的活化剂(均三甲苯磺酰氯)和醇,得到 Z 异构体。在这两种情况下,都实现了高非对映体过量和产率。
Diene rubber and method and composition for rubber treatment
申请人:Monsanto Company
公开号:US04433114A1
公开(公告)日:1984-02-21
Improved tack, green strength or non-black filler interaction capability are realized in a treated diene rubber. The method of treating diene rubber to achieve the improvements is shown, together with a composition in which maleamic acid or derivatives of maleamic acid are combined with sulfur or an organic sulfur compound capable of generating a thiyl radical.
New secondary amines are described which are prepared from inexpensive, commercially available raw materials, are stable at room temperature, and are reactive toward electrophiles. The secondary amines are prepared by the addition of one or more primary amines with one or more male (amide/ester) and fumar (amide/ester) Michael receptors. The above amines can be used as coreactants with aliphatic polyisocyanates for polyurea coatings. The novel secondary amines are also described as particularly useful as part of a two-part liquid pavement marking composition for pavement markings.
Organoborane amine complex initiator systems and polymerizable compositions made therewith
申请人:3M Innovative Properties Company
公开号:US20020040116A1
公开(公告)日:2002-04-04
A composition comprises organoborane amine complex and 1,4-dioxo-2-butene-functional material. The composition can form a part of a polymerization initiator system that also includes a compound that is reactive with the amine portion of the complex. The system can be used to initiate polymerization of acrylic monomer and to form an acrylic adhesive that has exceptionally good adhesion to low surface energy polymers.
Secondary amine-functional silanes, silane-functional polymers therefrom, and resulting cured polymers
申请人:3M Innovative Properties Company
公开号:US06440573B1
公开(公告)日:2002-08-27
Secondary amine-functional silanes comprising at least one ester group and at least one amide group are disclosed. The secondary amine-functional silanes are preparable from relatively inexpensive, commercially available raw ingredients, are stable at room temperature and are reactive toward electrophiles. Also disclosed are silane-terminated polymers, silane-terminated polyurethane dispersions, and moisture-cured polymers derived therefrom.