α-Functionalization of Ketones via a Nitrogen Directed Oxidative Umpolung
作者:Gabriel M. Kiefl、Tanja Gulder
DOI:10.1021/jacs.0c10700
日期:2020.12.9
methods available today, overcoming the inherent reactivity still remains a constant challenge in organic chemistry. The oxidative α-functionalization of ketones by external nucleophiles constitute such an example. Herein, we present a hypervalent F-iodane mediated umpolung of pyridyl ketones triggered by Lewis base/Lewis acid noncovalent interactions. A wide variety of external nucleophiles are introduced
Method for preparing poly(carbonate-etherimide) compound
申请人:PTT Global Chemical Public Company Limited
公开号:US10759904B2
公开(公告)日:2020-09-01
The present invention relates to a method for preparing poly(carbonate-etherimide) compound comprising polycarbonate segment as shown in the structure (A) and polyetherimide segment as shown in the structure (B). Said method does not contain a highly toxic phosgene in its operation, can be performed easily, and can be operated at not high temperature. wherein R1 represents aromatic with 6 to 30 carbon atoms or, optionally said aromatic is bonded with heteroatom; R2 represents aromatic with 6 to 30 carbon atoms or, optionally said aromatic is bonded with heteroatom; m is an integer from 1 to 15; and n is an integer from 1 to 10.
A METHOD FOR PREPARING POLY(CARBONATE-ETH ERIMIDE) COMPOUND
申请人:PTT Global Chemical Public Company Limited
公开号:EP3405453A2
公开(公告)日:2018-11-28
METHOD FOR PREPARING POLY(CARBONATE-ETHERIMIDE) COMPOUND
申请人:PTT GLOBAL CHEMICAL PUBLIC COMPANY LIMITED
公开号:US20190202980A1
公开(公告)日:2019-07-04
The present invention relates to a method for preparing poly(carbonate-etherimide) compound comprising polycarbonate segment as shown in the structure (A) and polyetherimide segment as shown in the structure (B). Said method does not contain a highly toxic phosgene in its operation, can be performed easily, and can be operated at not high temperature. wherein R
1
represents aromatic with 6 to 30 carbon atoms or, optionally said aromatic is bonded with heteroatom; R
2
represents aromatic with 6 to 30 carbon atoms or, optionally said aromatic is bonded with heteroatom; m is an integer from 1 to 15; and n is an integer from 1 to 10.