Ring Chain Transformations. XII [1] Synthesis of N-(3-Aminothioacryloyl)lactam Imines and their Transformation to 4-(?-Amino-alkyl)thiazoles or N-(Thien-2-yl)lactam Imines
锂离子电池(LIB)是最有前途的能量转换/存储系统之一,但应改善LIB中当前电解质的低热稳定性,以扩展其潜在应用。为了提高LIB的安全性,提出了一种新型的吡咯基离子液体(ILs)作为目前碳酸盐电解质的替代电解质,该电解质具有一些特定任务的官能团,即平面C N双键,CO醚连接,并且没有不稳定的CH键,旨在改善其电化学性能以及理化性质。结果,与已知IL相比,基于吡咯鎓的IL显示出大大改善的物理化学和电化学性质。在准备好的IL中,N-双烯丙基-2-甲氧基吡咯鎓双(氟磺酰基)酰亚胺(A(OMe)Pyrl-FSI,4)显示出高离子电导率(10.2 mS cm -1),非常好的循环性能(50次循环后保留率为99.3%)使用LiFePO 4电极,锂离子的转移数大大提高(0.19)。IL 4在5 C速率下还具有显着的速率能力,保留率为81.2%(124.8 mA h g -1),而在0.1 C速率下的初始放电容量为153
Efficient synthesis of 3-mono and disubstituted lactams using meerwein eschenmoser [3,3] sigmatropic rearrangements.
作者:Brian Coates、David J. Montgomery、Paul J. Stevenson
DOI:10.1016/s0040-4020(01)89678-2
日期:1994.3
3-Allyl substituted five six and seven membered lactams, are readily available in good yields and reasonable selectivity by a formal Meerwein Eschenmoser [3,3] rearrangement, using readily available methoxymethyleniminium salts and lithium alkoxides derived from allylalcohols.
[EN] PROCESS FOR THE PREPARATION OF 3-HALOALKYLPYRAZOLES<br/>[FR] PROCÉDÉS DE PRÉPARATION D'HALOALKYLPYRAZOLES
申请人:SYNGENTA PARTICIPATIONS AG
公开号:WO2012019950A1
公开(公告)日:2012-02-16
The present invention provides a process for the preparation of a compound of formula (I) wherein R1 is C1-C4 haloalkyl; R2 is optionally substituted alkyl, optionally substituted aryl or optionally substituted heteroaryl; and R3 is methyl or ethyl; comprising reacting a compound of formula (IV) wherein R1, R2 and R3 are as defined for the compound of formula I; with an alkylating agent in the presence of an amide.
Substituted 1-phenyl-2-pyrrolidin-2-yl-ethanols, their synthesis, their
申请人:Byk Gulden Lomberg Chemische Fabrik GmbH
公开号:US04198424A1
公开(公告)日:1980-04-15
Selected substituted 1-phenyl-2-pyrrolidin-2-yl-ethanols and their pharmacologically-acceptable acid-addition salts are useful as analgesics in human and veterinary medicine. Such compounds are prepared by reducing corresponding substituted 1-phenyl-2-pyrrolidin-2-yl ethanones and are formulated into medicinal compositions suitable for administration.
2-Benzylpyrrolidines bearing from 1 to 4 nuclear substituents on the benzyl ring are pharmacologically active, particularly on the CNS, on blood pressure and on pain sensation for warm-blooded animals. They are synthesized, e.g., by reducing appropriate 2-benzylpyrrolidines and are formulated into medicament compositions according to established conventional techniques.
Reaction of 2-alkoxyimmonium methosulfates (2), and of lactam acetals (3) derived therefrom, with alpha-haloesters in presence of zinc (Reformatsky condition) yielded N-alkyl-2-(alpha-alkyl-alpha-alkoxy-carbonyl)methylene-1-azacycloalkanes (6), while reaction of 3 with alpha-haloesters without zinc gave 3-alkoxycarbonylmethyl-1-azacycloalkane-2-one (5). Similar reaction of; 2 and 3 with 4-bromomethylquinolin-2-one (4) in presence of zinc gave N-alkyl-2-[4-(2-oxoquinolyl)methylene]-1-azacycloalkanes (7), a key intermediate for the synthesis of antimalarial quinoline-4-methanols.