Process of Making 2-Deoxy-2,2-Difluoro-D-Ribofuranosyl Nucleosides and Intermediates Therefor
申请人:Henschke Julian Paul
公开号:US20100056771A1
公开(公告)日:2010-03-04
A compound of formula (A) or salt thereof:
wherein each of R
1
, R
2
, and R
3
independently represents hydrogen, alkyl, aryl, acyl, sulfonyl, or silyl; P represents hydrogen or a hydroxy protective group. This compound may be used an intermediate for making a 2-deoxy-2,2-difluoro-D-ribofuranosyl nucleosides, such as gemcitabine.
Dication ether salts, R+-O-R+.2CF3SO3-, from the reaction of trifluoromethanesulfonic anhydride with activated ketones
作者:Peter J. Stang、Gerhard Maas、David L. Smith、James A. McCloskey
DOI:10.1021/ja00406a028
日期:1981.8
US8168766B2
申请人:——
公开号:US8168766B2
公开(公告)日:2012-05-01
Diiminium Nucleophile Adducts Are Stable and Convenient Strong Lewis Acids**
作者:Niklas Bormann、Jas S. Ward、Ann Kathrin Bergmann、Paula Wenz、Kari Rissanen、Yiwei Gong、Wolf‐Benedikt Hatz、Alexander Burbaum、Florian F. Mulks
DOI:10.1002/chem.202302089
日期:2023.10.18
Diiminium nucleophile adducts, convenient Lewis acids that satisfy some measures for superacidity, have been synthesised by coordination with stabilising pyridine donors. Even in their abstraction of half an equivalent of oxide from a P=O bond, favourable abstraction kinetics were observed. Our preliminary results combined with price and safety considerations suggest that the adducts are excellent acylation