Reaction of NaCO(CO)4 with R2BI under carbon monoxide at atmospheric pressure at room temperature readily gives the dialkyl ketones in good yields (61–85%) after H2O2/OH− oxidation.
[EN] LIPIDS AND LIPID COMPOSITIONS FOR THE DELIVERY OF ACTIVE AGENTS<br/>[FR] LIPIDES ET COMPOSITIONS LIPIDIQUES DESTINÉS À LA LIBÉRATION D'AGENTS ACTIFS
申请人:NOVARTIS AG
公开号:WO2015095346A1
公开(公告)日:2015-06-25
This invention provides for a compound of formula (I) or a pharmaceutically acceptable salt thereof, wherein R1-R3, n, p, L1 and L2 are defined herein. The compounds of formula (I) and pharmaceutically acceptable salts thereof are cationic lipids useful in the delivery of biologically active agents to cells and tissues.
[EN] LIPIDS AND LIPID COMPOSITIONS FOR THE DELIVERY OF ACTIVE AGENTS<br/>[FR] LIPIDES ET COMPOSITIONS LIPIDIQUES POUR L'ADMINISTRATION DE PRINCIPES ACTIFS
申请人:NOVARTIS AG
公开号:WO2014136086A1
公开(公告)日:2014-09-12
This invention provides for a compound of formula (I): or a pharmaceutically acceptable salt thereof, wherein R1–R4, L and X are defined herein. The compounds of formula (I) and pharmaceutically acceptable salts thereof are cationic lipids useful in the delivery of biologically active agents to cells and tissues.
What is described is a compound of formula I
consisting of a compound in which R
1
is a branched chain alkyl consisting of 10 to 31 carbons; R
2
is a linear alkyl, alkenyl, or alkynyl consisting of 2 to 20 carbons; L
1
and L
2
are the same or different, each a linear alkylene of 1 to 20 carbons or a linear alkenylene of 2 to 20 carbons; X
1
is S or O; R
3
is a linear or branched alkylene consisting of 1 to 6 carbons; and R
4
and R
5
are the same or different, each a hydrogen or a linear or branched alkyl consisting of 1 to 6 carbons; or a pharmaceutically acceptable salt thereof.
From Alkyl Halides to Ketones: Nickel‐Catalyzed Reductive Carbonylation Utilizing Ethyl Chloroformate as the Carbonyl Source
作者:Renyi Shi、Xile Hu
DOI:10.1002/anie.201903330
日期:2019.5.27
remains in high demand. Described here is a nickel‐catalyzed three‐component reductive carbonylation method for the synthesis of dialkyl ketones. A wide range of both symmetric and asymmetric dialkyl ketones can be accessed from alkyl halides and a safe CO source, ethyl chloroformate. The approach offers complementary substrate scope to existing carbonylation methods while avoiding the use of either toxic