New Route to <i>N</i>‐Alkylated <i>trans</i>‐Pyrrolidine Diols from 2,2,3,3‐Tetramethoxybutane‐Protected Dimethyl Tartrate
作者:J. Graça Martins、P. Cambeiro Barrulas、Carolina S. Marques、Anthony J. Burke
DOI:10.1080/00397910801916520
日期:2008.4
Abstract A short synthesis of some trans‐pyrrolidine diols is described starting from (2R,3R,5R,6R)‐5,6‐dimethoxy‐5,6‐dimethyl[1,4]dioxane‐2,3‐dicarboxylic acid dimethyl ester 3. The key step was the occurrence of a tandem azidereduction/cyclization sequence on mono‐azide intermediate 6 upon catalytic hydrogenation. This method afforded both (3R,4R)‐(+)‐1‐benzyl‐3,4‐pyrrolidinediol 9a and (3R,4R)‐(+)‐1‐allyl‐3
Catalysts suitable for asymmetric hydrogenation reactions is described comprising the reaction product of a group 8 transition metal compound a chiral phosphine and a chiral diamine of formula (I)
in which R
1
, R
2
, R
3
and R
4
are independently hydrogen, a saturated or unsaturated alkyl or cycloalkyl group, an aryl group or a urethane or sulphonyl group and R
5
, R
6
, R
7
and R
8
are independently hydrogen, a saturated or unsaturated alkyl or cycloalkyl group, or an aryl group, at least one of R
1
, R
2
, R
3
and R
4
is hydrogen and A is a linking group comprising one or two substituted or unsubstituted carbon atoms.
Teresa Barros; Phillips, Ana Maria Faisca, Molecules, 2006, vol. 11, # 2-3, p. 177 - 196
作者:Teresa Barros、Phillips, Ana Maria Faisca
DOI:——
日期:——
PHOTO-PATTERNABLE CROSS-BRED ORGANIC SEMICONDUCTOR POLYMERS FOR ORGANIC THIN-FILM TRANSISTORS
申请人:Corning Incorporated
公开号:US20220155683A1
公开(公告)日:2022-05-19
A polymer blend, including at least one organic semiconductor (OSC) polymer, such that: the at least one OSC polymer is a diketopyrrolopyrrole-fused thiophene polymeric material, the fused thiophene is beta-substituted, the at least one OSC polymer has a first portion and a second portion, and at least one of the first portion or the second portion includes at least one UV-curable side chain.