The outcome of the amidation reaction mediated by PPh3–I2 was found to be highly dependent on the addition sequence of the reagents.
PPh3-I2介导的酰胺化反应的结果被发现高度依赖试剂的加入顺序。
Graphene Oxide: A Metal‐Free Carbocatalyst for the Synthesis of Diverse Amides under Solvent‐Free Conditions
作者:Khushbu P. Patel、Eknath M. Gayakwad、Vilas V. Patil、Ganapati S. Shankarling
DOI:10.1002/adsc.201801673
日期:2019.4.23
solvent‐free reaction conditions providing desired products in good to excellent yields. The one‐pot synthesis of 2,3‐Dihydro‐5H‐benzo[b]‐1,4‐thiazepin‐4‐one moiety by GO catalyzed Aza Michael addition followed by intramolecular transamidation is also described. A plausible reaction mechanistic pathway involving H‐bonding is discussed. The graphene oxide can be recycled and reused up to five cycles without
Graphene oxide: a convenient metal-free carbocatalyst for facilitating amidation of esters with amines
作者:Khushbu P. Patel、Eknath M. Gayakwad、Ganapati S. Shankarling
DOI:10.1039/c9nj05283f
日期:——
Herein, we report a grapheneoxide (GO) catalyzed condensation of non-activated esters and amines, that can enable diverse amides to be synthesized from abundant ethyl esters forming only volatile alcohol as a by-product. GO accelerates ester to amide conversion in the absence of any additives, unlike other catalysts. A wide range of ester and amine substrates are screened to yield the respective amides
Azabicyclic compounds, a process for their preparation and pharmaceutical compositions containing them.
申请人:Casara Patrick
公开号:US20070197625A1
公开(公告)日:2007-08-23
A compound selected from those of formula (I):
wherein m and n, which may be identical or different, each represent an integer from 0 to 2 inclusive, with the sum of the two integers being from 2 to 3 inclusive, p and q, which may be identical or different, each represent an integer from 0 to 2 inclusive, Alk represents an alkylene, alkenylene or alkynylene chain, X represents an oxygen atom, a sulphur atom or an —N(R)— group wherein R represents a hydrogen atom or an alkyl group, Y, Y′ and W are as defined in the description, its enantiomers, diastereoisomers, and addition salts thereof with one or more pharmaceutically acceptable acid or base. Medicinal products containing the same which are useful for treating conditions associated with central histaminergic systems.
The intention relates to bacterial antibiotic resistance and, in particular, to compositions and methods for overcoming bacterial antibiotic resistance. The invention provides novel β-lactamase inhibitors, which are structurally unrelated to the natural product and semi-synthetic β-lactamase inhibitors presently available, and which do not require a β-lactam pharmacophore. The invention also provides pharmaceutical compositions and methods for inhibiting bacterial growth.