[EN] THIOPHENE DERIVATIVES FOR THE TREATMENT OF DISORDERS CAUSED BY IGE<br/>[FR] DÉRIVÉS DE THIOPHÈNE POUR LE TRAITEMENT DE TROUBLES PROVOQUÉS PAR IGE
申请人:UCB BIOPHARMA SRL
公开号:WO2019243550A1
公开(公告)日:2019-12-26
Thiophene derivatives of formula (I) and a pharmaceutically acceptable salt thereof are provided. These compounds have utility for the treatment or prevention of disorders caused by IgE, such as allergy, type 1 hypersensitivity or familiar sinus inflammation.
Homoleptic lanthanide complex Y[N(TMS)2]3 is an efficient homogeneous catalyst for the hydroboration reduction of secondary amides and tertiary amides to corresponding amines. A series of amides containing different functional groups such as cyano, nitro, and vinyl groups were found to be well-tolerated. This transformation has also been nicely applied to the synthesis of indoles and piribedil. Detailed
herein is the development of a simple but practical catalytic system for the selective reduction of amides with hydrosilane or hydrosiloxane. Low-cost and readily available triethylborane (1.0 M in THF), in combination with a catalytic amount of an alkali metal base, was found to catalyze the reduction of all three amide classes (tertiary, secondary, and primary amides) to form amines under mild conditions
A mild, convenient, and inexpensive method for converting imines into amines: Tin-catalyzed reduction with polymethylhydrosiloxane (PMHS)
作者:Rosa M. Lopez、Gregory C. Fu
DOI:10.1016/s0040-4020(97)01020-x
日期:1997.12
protocol for reducing imines to amines. Thus, treatment of any of a wide array of imines with catalytic n-butyltris(2-ethylhexanoate)tin and stoichioimetric polymethylhydrosiloxane (PMHS) in ethanol at room temperature cleanly affords the desired secondary amine product. Alkyl bromides, alkynes, epoxides, esters, nitriles, and olefins are inert toward these reduction conditions, whereas aldehydes, ketones
procedures for the catalytichydrosilylation of secondary and tertiary amides under mild conditions have been developed. In the presence of inexpensive zinc catalysts, tertiary amides are easily reduced by applying monosilanes. Key to success for the reduction of the secondary amides is the use of zinc triflate and disilanes with dual SiH moieties. The presented hydrosilylations proceed with excellent