Zn-Promoted Regioselective and Sequence-Selective One-Pot Joining Reaction of Three Components: Alkyl Iodides, α,β-Unsaturated Esters (or Nitriles), and Acylating Agents
iodides, alpha,beta-unsaturated esters (or nitriles), and acylating agents such as nitriles or acid anhydrides in the presence of Zn metal at room temperature in the same reaction system brought about a regioselective and sequence-selective three-component joining reaction involving first C-alkylation at the beta-position and second C-acylation at the alpha-position of alpha,beta-unsaturated esters (or
The present invention relates generally to the amphiphilic polyelectrolyte, poly(2-ethylacrylic acid) and covalently bonded lipids to generate Lipo-PEAA. These Lipo-PEAA are then used to make pH-sensitive liposomes which become unstable, permeable or fusogenic with certain pH changes. In addition, this invention generally describes methods for delivering therapeutic compounds and drugs to target cells by administering to a host the pH-sensitive liposomes of the present invention.
[reaction: see text] The Michael addition to alpha-substituted alpha,beta-unsaturated esters and amides using complex A containing a chiral odorless thiol proceeded diastereoselectively. The Michael adducts were converted to beta-mercapto esters and amides via a Wagner-Meerwein rearrangement with boron trifluoride etherate and a thiol exchange reaction using odorless 1-dodecanethiol. This conversion
Alkylation of Allyl/Alkenyl Sulfones by Deoxygenation of Alkoxyl Radicals
作者:Jia-Bin Han、Ao Guo、Xiang-Ying Tang
DOI:10.1002/chem.201806138
日期:2019.2.26
challenging deoxygenation of alkoxyl radicals from readily accessible alcohol derivatives was developed, affording facile synthesis of functionalized alkenes with good functional group tolerance under mild reaction conditions. Because alkoxyl radicals can easily undergo β‐fragmentations or hydrogen abstractions, this new strategy for deoxygenation of alkoxyl radicals is highly valuable. Moreover, mechanistic
Process for producing alpha, beta-unsaturated carboxylic acid esters and catalyst for use in such process
申请人:Nippon Shokubai Co., Ltd.
公开号:EP1123915A1
公开(公告)日:2001-08-16
Economical and efficient processes for producing an α, β-unsaturated carboxylic acid heterocycle-inserted ester and an α,β-unsaturated carboxylic acid polyheteroalkylene ester as well as a catalyst suited for use in economically and efficiently producing an α,β-unsaturated carboxylic acid ester are provided.
The invention provides
(1) a process for producing an α,β-unsaturated carboxylic acid ester which comprises reacting an α,β-unsaturated carboxylic acid ester with a heterocyclic compound,
(2) a process for producing an α,β-unsaturated carboxylic acid ester
which comprises reacting an α,β-unsaturated carboxylic acid with a heterocyclic compound
in the presence of a polymerization inhibitor and a metal oxide catalyst, and
(3) a catalyst for the production of an α,β-unsaturated carboxylic acid ester
comprising a metal oxide.