MICROWAVE-ASSISTED RAPID HYDROLYSIS AND PREPARATION OF THIOAMIDES BY WILLGERODT-KINDLER REACTION
摘要:
Aldehydes and aryl alkyl ketones were efficiently transformed to thioamides with the same number of carbon atoms via Willgerodt-Kindler reaction under microwave irradiation in solvent-free conditions. The thioamides obtained were hydrolyzed to corresponding carboxylic acids with microwave dielectric heating in one minute. Both reactions are very fast and the yields are excellent.
Selective carbophilic addition of organolithiums to thioamides. A novel synthesis of unsymmetrical ketones and α-alkylated amines
作者:Yoshinori Tominaga、Shinya Kohra、Akira Hosomi
DOI:10.1016/s0040-4039(01)81034-0
日期:1987.1
Thioamides, readily available from aldehydes, sulfur and secondary amines, can be converted to unsymmetrical ketones by the carbophilic addition of organolithiums to the thiocarbonyl group. Reduction of the intermediates with lithiumaluminumhydride gives α-alkylated or α-arylated amines.
for the thioacylation of amines using α-ketoacids and elemental sulfur has been developed. The key to success for this transformation is the nucleophilic activation of elemental sulfur by thiols such as 1-dodecanethiol. A variety of functional groups, including unprotected hydroxyl, carboxyl, amide, sulfide, and tertiary amine moieties are tolerated under the applied reaction conditions. To demonstrate
已经开发了一种使用 α-酮酸和元素硫对胺进行硫代酰化的温和且化学选择性的方法。这种转化成功的关键是硫醇(如 1-十二烷硫醇)对元素硫的亲核活化。在所应用的反应条件下,可以耐受各种官能团,包括未保护的羟基、羧基、酰胺、硫化物和叔胺部分。为了证明与使用 Lawesson 试剂或 P2S5 的传统 OS 交换反应相比,该方法的优势,将硫代酰胺部分特定地引入到生物活性化合物中。
Aqueous Compatible Protocol to Both Alkyl and Aryl Thioamide Synthesis
作者:Jianpeng Wei、Yiming Li、Xuefeng Jiang
DOI:10.1021/acs.orglett.5b03541
日期:2016.1.15
An efficient aqueous synthesis of thioamides through aldehydes, sodium sulfide, and N-substituted formamides has been developed. Both alkyl and aryl aldehydes are amenable to this protocol. N-Substituted formamides are essential for this transformation. Readily available inorganic salt (sodium sulfide) serves as the sulfur source in water, which makes this method much more practical and efficient.
Substituted 1,3,4-thiadiazoles with anticonvulsant activity. 2. Aminoalkyl derivatives
作者:Michael R. Stillings、Anthony P. Welbourn、Donald S. Walter
DOI:10.1021/jm00161a025
日期:1986.11
This paper describes the synthesis and pharmacological evaluation of a number evaluation of a number of substituted 1,3,4-thiadiazoles. The first member of the series, 2-(aminomethyl)-5-(2-biphenylyl)-1,3,4-thiadiazole (7) was found to possess potent anticonvulsant properties in rats and mice and compared favorably with the standard anticonvulsant drugs phenytoin, phenobarbital, and carbamazepine in