Structure−Property Relations of Regiosymmetrical 3,4-Dioxy-Functionalized Polythiophenes
作者:Christian B. Nielsen、Thomas Bjørnholm
DOI:10.1021/ma051609t
日期:2005.12.1
from adapting a coplanar structure with a short π-stacking distance in the solid state. We furthermore show that incorporation of less space filling units in the form of unsubstituted thiophene units into the polymer chain reduces these unfavorable interactions and therefore allows for a more coplanar polymer backbone orientation and a shorter π-stacking distance in the solid state. These findings are
Synthesis of 3,6-dialkyl-5,6-dihydro-4-hydroxy-2H-pyran-2one
申请人:F. HOFFMANN-LA ROCHE AG
公开号:EP1127886A1
公开(公告)日:2001-08-29
The present invention relates to a novel process for producing a δ-lactone of the formula:
using an acyl halide of the formula:
wherein R1, R2 R3 and X are described herein, as well as novel intermediates. In particular, the present invention relates to a process for enantioselectively producing the δ-lactone.
本发明涉及一种生产式 δ-内酯的新工艺:
式的δ-内酯的新工艺:
其中 R1、R2 R3 和 X 如本文所述,以及新型中间体。本发明尤其涉及一种对映体选择性生产δ-内酯的工艺。
Functional Group Tolerance in Organocatalytic Regioselective Acylation of Carbohydrates
Organocatalytic regioselective acylation of mono- and disaccaharides with various functionalized acid anhydrides has been developed. Acylation Of octyl beta-D-glucopyranoside with acid anhydrides derived from alpha-amino acids, cinnamic acid, and gallic acid took place at C(4)-OH with 67-94% regioselectivity in the presence of catalyst 1. Regioselective acylation of disaccharides with functionalized acid anhydrides was also achieved with 78-94% selectivity. Especially, a disaccharide with seven free hydroxy groups (X = OH, R' = H) underwent acylation at C(4)-OH with 78% regioselectivity in the presence of 1. Thus, functional group tolerance in the regioselective acylation catalyzed by I was found to be high.
US6552204B1
申请人:——
公开号:US6552204B1
公开(公告)日:2003-04-22
LIPID NANOPARTICLE (LNP) DELIVERY SYSTEMS AND FORMULATIONS
申请人:[en]PRIME MEDICINE, INC.
公开号:WO2024119098A1
公开(公告)日:2024-06-06
The present disclosure describes compositions, nanoparticles (such as lipid nanoparticles), and/or lipid nanoparticle compositions and methods of their use.