Gram-Scale Preparation of Acyl Fluorides and Their Reactions with Hindered Nucleophiles
作者:Michał Barbasiewicz、Michał Tryniszewski
DOI:10.1055/a-1649-5460
日期:2022.3
A series of acyl fluorides was synthesized at 100 mmol scale using phase-transfer-catalyzed halogen exchange between acyl chlorides and aqueous bifluoride solution. The convenient procedure consists of vigorous stirring of the biphasic mixture at room temperature, followed by extraction and distillation. Isolated acyl fluorides (usually 7–20 g) display excellent purity and can be transformed into sterically
derivatives to form fluorinated analogues. All reactions proceed rapidly and under mild conditions. The use of a catalytic amount of 1 and KF in toluene led to a relatively high yield of a selected fluoroformate.
2-[(CH 3)2 NCH 2 ] C 6 H 4 }(n- Bu)2 SnF(1)与各种氯甲酸酯,酰氯,甲磺酰氯,4,4'-二甲氧基三苯甲基氯和光气前体或衍生物反应形成氟化类似物。所有反应均在温和条件下快速进行。在甲苯中使用催化量的1和KF导致选择的氟甲酸酯的产率较高。
PROCESS FOR PRODUCING PHTHALIC ACID COMPOUND INCLUDING CHLORINATED AROMATIC RING
申请人:Souda Hiroshi
公开号:US20120035395A1
公开(公告)日:2012-02-09
Provided is a process for producing a phthalic acid compound whose aromatic ring has been chlorinated, the process reacting a phthalic acid compound and chlorine in a mixture of chlorosulfonic acid and thionyl chloride in the presence of an iodine compound.
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0372656A2
公开(公告)日:1990-06-13
Linear alternating copolymers derived from units (A) of 1,6-di(4-oxyphenyl)-1,6-diazaspiro[4.4]nonane-2,7-dione and units (B) selected from carbonyl, phenylene-dicarbonyl, carbonyl-diphenylene and cyanophenylene.
A PROCESS FOR PREPARING A POLYARYLENESULFONE/POLYESTER BLOCK COPOLYMER (P)
申请人:BASF SE
公开号:EP3381965A1
公开(公告)日:2018-10-03
The present invention relates to a process for preparing a polyarylenesulfone/polyester block copolymer (P) and to the polyarylenesulfone/polyester block copolymer (P) as such.