马尿酸 在
乙酸酐 、 petroleum ether 、 乙醇 作用下,
以
乙酸酐 为溶剂,
反应 2.0h,
以to give 25 g of 2-phenyl-5-oxazolone as crystals of melting point 90° C.的产率得到2-phenyl-oxazol-5-one
参考文献:
名称:
Heterocyclic diarylmethylene derivatives, methods of preparing them and
Synthesis of 2,5-Bis(hetero)aryl 4′-Substituted 4,5′-Bisoxazoles via Copper(I)-Catalyzed Domino Reactions of Activated Methylene Isocyanides with 2-Phenyl- and 2-(2-Thienyl)-4-[(aryl/heteroaryl)(methylthio)methylene]oxazol-5(4<i>H</i>)-ones
作者:Somaraju Yugandar、Anand Acharya、Hiriyakkanavar Ila
DOI:10.1021/jo400317g
日期:2013.4.19
An efficient straightforward synthesis of 2,5,4′-trisubstituted 4,5′-bisoxazoles via copper(I)-catalyzed domino reactions of 2-phenyl- and 2-(2-thienyl)-4-[(aryl/heteroaryl)methylene]-5-oxazolones with activatedmethylene isocyanides has been reported. The overall domino process comprised of formation of one C–C and two C–O bonds involves initial nucleophilic ring opening of oxazolones by cupriomethylene
Method of treatment using 1-oxo-1H-2-benzopyran-3-carboxylic acid
申请人:Richardson-Merrell Inc.
公开号:US03987185A1
公开(公告)日:1976-10-19
The method comprises administering to an animal an amount of substituted-1-oxo-1H-2-benzopyran-3-carboxylic acid effective to inhibit antigen-antibody reaction in said animal. Representative of the compounds that can be used in the method is sodium 1-oxo-1H-2-benzopyran-3-carboxylate.
Process for the preparation of 2-(2-thienyl)-ethylamine and derivatives
申请人:Occidental Chemical Corporation
公开号:US04874876A1
公开(公告)日:1989-10-17
The present invention provides a process for the preparation of 2-(2-thienyl)-ethylamine and derivatives thereof having the general formula: ##STR1## wherein R.sub.1 and R.sub.2 are hydrogen or taken together form a phenyl ring.
Anti-NTB-A antibodies and antigen-binding fragments thereof, as well as pharmaceutical compositions comprising such antibodies and antigen-binding fragments are described. Also described are methods of using such antibodies and antigen-binding regions to bind NTB-A and treat diseases, such as hematologic malignancies, which are characterized by expression of NTB-A.
Process for the preparation of 2-(2-thienyl)-ethylamine and derivatives thereof
申请人:OCCIDENTAL CHEMICAL CORPORATION
公开号:EP0367233A2
公开(公告)日:1990-05-09
The present invention provides a process for the preparation of 2-(2-thienyl)-ethylamine and derivatives thereof having the general formula:
wherein R₁ and R₂ are hydrogen or taken together form a phenyl ring.