A Mild and General Larock Indolization Protocol for the Preparation of Unnatural Tryptophans
作者:Kangway V. Chuang、Madeleine E. Kieffer、Sarah E. Reisman
DOI:10.1021/acs.orglett.6b02477
日期:2016.9.16
A mild and general protocol for the Pd(0)-catalyzed heteroannulation of o-bromoanilines and alkynes is described. Application of a Pd(0)/P(tBu)3 catalyst system enables the efficient coupling of o-bromoanilines at 60 °C, mitigating deleterious side reactions and enabling access to a broad range of useful unnatural tryptophans. The utility of this new protocol is demonstrated in the highly convergent
scarce, and precise and reversible modulation of SDH still remains challenging. Herein, a powerful tool for reversible optical control of SDH was proposed and evaluated utilizing the technology of photopharmacology. We reported photochromic ligands (PCLs), azobenzene–pyrazole amides (APAs), that exert light-dependent inhibition effects on SDH. Physicochemical property tests and biological assays were conducted
Polyurethane foams prepared from condensation products of amines, epihalohydrins and alkylene oxides
申请人:BASF WYANDOTTE CORPORATION
公开号:EP0008307A1
公开(公告)日:1980-03-05
Oxyalkylated condensation products prepared from aliphatic and aromatic amines, epihalohydrin and alkylene oxides are used in the preparation of polyurethane foams.
由脂肪胺和芳香胺、表卤代醇和氧化亚烷基制备的氧烷基缩合产品可用于制备聚氨酯泡沫。
Solutions of resins in a monomer, containing polyamine reactable with isocyanates, moulding compositions and cured product thereof
申请人:ICI AMERICAS INC.
公开号:EP0028470A2
公开(公告)日:1981-05-13
Ethylenically unsaturated monomer solutions of ethylenically unsaturated polyester, polyester urethane and polyisocyanurate resins are quickly converted to moldable gels by the homogeneous formation therein of polyurea resins by the interaction of polyamines and polyisocyanates. Tack-free handleable moldable gels are formed within minutes which can be stored under normal conditions for long periods of time until molded. Fully cured intractable articles are formed by the polymerization of the ethylenically unsaturated ingredients.