Abstractmagnified imageDimerization of N‐protected propargylic amines in a rather rare head‐to‐tail mode has been achieved under mild conditions with high selectivity using rhodium catalysts. The N‐protecting group could be a sulfonyl, carbamate, or carbonyl functionality and (cyclooctadiene)rhodium chloride dimer/1,1′‐bis(diphenylphosphino)ferrocene {[Rh(COD)Cl]2/dppf} as well as tris(triphenylphosphine)rhodium chloride [Rh(PPh3)3Cl] proved to be active catalysts. In addition, these functionalized gem‐enynes subsequently undergo selective gold(III)‐catalyzed intramolecular hydroamination to give trisubstituted pyrroles under mild conditions.
A novel palladium-catalyzed regiocontrollable hydroarylation reaction of allenamides with B2pin2/H2O has been disclosed. H2O as an ideal hydrogen source was activated by B2pin2 to furnish allylamines or enamines with a broad functional group tolerance. The regioselectivity for both of the two products was up to 99 : 1 for most of the examples, which was achieved by adjusting the addition order of the
已经公开了新颖的钯催化的烯丙基酰胺与B 2 pin 2 / H 2 O的区域可控的氢芳基化反应。作为理想氢源的H 2 O被B 2 pin 2活化,以提供具有宽泛的官能团耐受性的烯丙胺或烯胺。在大多数实施例中,两种产物的区域选择性都高达99:1,这是通过调节催化剂和碘代苯衍生物的加成顺序来实现的。该机制的初步调查证明反应是一个非自由基处理和氘标记的实验表明,氢是选自H 2 O.
JAK2 JH2 Fluorescence Polarization Assay and Crystal Structures for Complexes with Three Small Molecules
作者:Ana S. Newton、Luca Deiana、David E. Puleo、José A. Cisneros、Kara J. Cutrona、Joseph Schlessinger、William L. Jorgensen
DOI:10.1021/acsmedchemlett.7b00154
日期:2017.6.8
The syntheses of the fluorescent 5 and 6 used in the assay are reported as well as Kd results for 10 compounds, including JNJ7706621, NVP-BSK805, and filgotinib (GLPG0634). X-ray crystalstructures of JAK2 JH2 in complex with NVP-BSK805, filgotinib, and diaminopyrimidine 8 elucidate the binding poses.
Prevention of loss and restoration of bone mass by certain prostaglandin agonists
申请人:Pfizer Inc.
公开号:US06288120B1
公开(公告)日:2001-09-11
Prostaglandin agonists of formula (I), in which, for example, A is a sulphonyl or acyl group, B is N or CH, M contains a ring and K and Q are linking groups, methods of using such prostaglandin agonists, pharmaceutical compositions containing such prostaglandin agonists and kits useful for the treatment of bone disorders including osteoporosis.