[EN] PROCESSES FOR THE PREPARATION OF ARGINASE INHIBITORS AND THEIR SYNTHETIC INTERMEDIATES<br/>[FR] PROCÉDÉS DE PRÉPARATION D'INHIBITEURS D'ARGINASE ET LEURS INTERMÉDIAIRES SYNTHÉTIQUES
申请人:INCYTE CORP
公开号:WO2022016195A1
公开(公告)日:2022-01-20
Provided herein are processes and intermediates useful for the preparation of certain compounds, including a compound of formula 21 or formula 22 or a pharmaceutically acceptable salt of either.
Process for preparing 2-alkyl-1,4-butanediols and mixtures with 1,4-butanediol which comprises bringing together, at an initial alkaline pH, and at a temperature and pressure suitable for reaction, a mixture of 4-hydroxybutyraldehyde and/or its cyclic acetal, 2-hydroxytetrahydrofuran, hydrogen, an unsubstituted aliphatic aldehyde, especially formaldehyde, and a hydrogenation catalyst. Also processes for preparing mixtures of tetrahydrofuran and 3-alkyltetrahydrofuran from the diol mixtures, and copolymers from the tetrahydrofuran mixtures.
A nonlinear optical material having a high nonlinear optical constant useful for frequency doubler of laser beam which comprises a chiral smectic C liquid crystalline polyester consisting essentially of the structural units having the general formulae (A). (B) and (C):
Wherein X is a structural unit selected from the group consisting of
Wherein Y is a group having at least one optically active carbon and the total carbon number of Y is 3-12.
wherein n is an integer of 2-10.
一种具有高非线性光学常数的非线性光学材料,可用于激光束的倍频器,它由手性 Smectic C 液晶聚酯组成,该聚酯主要由具有通式(A).(B) 和 (C):
其中,X 是选自以下组别的结构单元
其中,Y 是至少具有一个光学活性碳的基团,Y 的总碳数为 3-12。
其中 n 为 2-10 的整数。
Synthesis of mixtures of butanediols
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0343841A2
公开(公告)日:1989-11-29
Process for preparing 2-alkyl-1,4-butanediols and mixtures with 1,4-butanediol which comprises bringing together, at an initial alkaline pH, and at a temperature and pressure suitable for reaction, 2,3-dihydrofuran, hydrogen, an unsubstituted aliphatic aldehyde, especially formaldehyde, and a hydrogenation catalyst. Also processes for preparing mixtures of tetrahydrofuran and 3-alkyltetrahydrofuran from the diol mixtures, and copolymers from the tetrahydrofuran mixtures.