Synthesis of Aminocyclobutanes by Iron-Catalyzed [2+2] Cycloaddition
作者:Florian de Nanteuil、Jérôme Waser
DOI:10.1002/anie.201303803
日期:2013.8.19
Fab Four: An iron‐catalyzed [2+2] cycloaddition furnishes aminocyclobutanes with a broad range of substituents in excellent yields and diastereoselectivities. The products can be obtained on a gram scale and can be further converted to β‐peptide derivatives in a few steps. Furthermore, a [4+2] cycloaddition between an aminocyclobutane and an olefin leads to the corresponding cyclohexylamines.
The present invention provides method and materials for forming a polymeric matrix having improved biocompatible properties. A polymerization accelerator is provided that includes an N-vinyl group and a biocompatible functional group. The polymerization accelerator is particularly useful for the polymerization of macromers, which can be used to form biocompatible polymeric coatings on the surface of biological materials, such as cells and tissue.
methods for the convergent synthesis of (poly)cyclic scaffolds are urgently needed in synthetic and medicinal chemistry. Herein, we describe new annulation reactions of thioalkynes with phthalimide‐substituted donor–acceptor cyclopropanes, which gave access to highly substituted cyclopentenes and polycyclic ring systems. With silyl‐thioalkynes, the Lewis acid catalyzed [3+2] annulation reaction with
NON-IONIC ARYL KETONE BASED POLYMERIC PHOTO-ACID GENERATORS
申请人:International Business Machines Corporation
公开号:US20180044459A1
公开(公告)日:2018-02-15
Non-ionic photo-acid generating (PAG) polymerizable monomers were prepared that contain a side chain sulfonate ester of an alpha-hydroxy aryl ketone. The aryl ketone group has a perfluorinated substituent alpha to the ketone carbonyl. The sulfur of the sulfonate ester is also directly linked to a fluorinated group. PAG polymers prepared from the PAG monomers release a strong sulfonic acid when exposed to high energy radiation such as deep UV or extreme UV light. The photo-generated sulfonic acid has a low diffusion rate in an exposed resist layer subjected to a post-exposure bake (PEB) at 100° C. to 150° C., resulting in formation of good line patterns after development.
[EN] DUAL FUNCTION POLYMER MICELLES<br/>[FR] MICELLES POLYMERES A FONCTION DOUBLE
申请人:UNIV CASE WESTERN RESERVE
公开号:WO2005120585A1
公开(公告)日:2005-12-22
The invention relates to micelles that are elaborated with functionality useful for imaging and/or selectively targeting tissue, e.g., in the delivery of hydrophobic agents.