Substrate Activity Screening: A Fragment-Based Method for the Rapid Identification of Nonpeptidic Protease Inhibitors
作者:Warren J. L. Wood、Andrew W. Patterson、Hiroyuki Tsuruoka、Rishi K. Jain、Jonathan A. Ellman
DOI:10.1021/ja0547230
日期:2005.11.1
A new fragment-basedmethod for the rapid development of novel and distinct classes of nonpeptidic protease inhibitors, SubstrateActivityScreening (SAS), is described. This method consists of three steps: (1) a library of N-acyl aminocoumarins with diverse, low molecular weight N-acyl groups is screened to identify protease substrates using a simple fluorescence-based assay, (2) the identified N-acyl
Rhodium-Catalyzed Tandem Cyclopropanation/Cope Rearrangement of 4-Alkenyl-1-sulfonyl-1,2,3-triazoles with Dienes
作者:Brendan T. Parr、Huw M. L. Davies
DOI:10.1002/anie.201304310
日期:2013.9.16
Take your pick…︁ A practical method for the synthesis of structurally diverse rhodium vinylcarbenes from stable 1‐sulfonyl‐1,2,3‐triazole precursors has been developed. The reaction is general for a broad range of 4‐alkenyl triazoles and dienes, enabling the stereoselective synthesis of a variety of polycyclic imines, which are readily converted into amines or aldehydes in a one‐pot process.
Conversion of Cyclic Ketones to 2,3-Fused Pyrroles and Substituted Indoles
作者:Joshua S. Alford、Jillian E. Spangler、Huw M. L. Davies
DOI:10.1021/ja405043g
日期:2013.8.14
A highly effective synthesis of 2,3-fused pyrroles from cyclicketones has been achieved. The transformation includes a rhodium-catalyzed reaction of 4-alkenyl-1-sulfonyl-1,2,3-triazoles featuring an unusual 4π electrocyclization. The methodology was further extended to the synthesis of indoles using a one-pot reaction starting from 1-ethynylcyclohexenes.
Isomerization of Propargylic Alcohols into α,β-Unsaturated Carbonyl Compounds Catalyzed by the Sixteen-Electron Allyl-Ruthenium(II) Complex [Ru(η3-2-C3H4Me)(CO)(dppf)][SbF6]
作者:Victorio Cadierno、Sergio E. García-Garrido、José Gimeno
DOI:10.1002/adsc.200505294
日期:2006.1
(η3-allyl)-ruthenium(II) complex [Ru(η3-2-C3H4Me)(CO)(dppf)][SbF6] is an efficient catalyst for the regioselective isomerization of terminal propargylic alcohols HCCCR1R2(OH) into α,β-unsaturatedaldehydes R1R2CCHCHO or ketones R3R4CC(R1)COMe (if R2=CHR3R4) under mild conditions. This complex has been also used as catalyst for the preparation of conjugated 1,3-enynes via dehydration of propargylic alcohols
16-E -(η 3 -烯丙基) -钌(II)配合物的[Ru(η 3 -2-C 3 H ^ 4 ME)(CO)(DPPF)] [的SbF 6 ]是用于区域选择性异构化的有效催化剂在温和条件下将末端炔丙醇HCCCR 1 R 2(OH)转变为α,β-不饱和醛R 1 R 2 CCHCHO或酮R 3 R 4 CC(R 1)COMe(如果R 2 = CHR 3 R 4)。这种复杂的也已用作催化剂用于制备缀合的1,3-烯炔的经由 炔丙醇的脱水。
Facile Synthesis of Tetrahydro-1<i>H</i>-isoindolones via a Sequential Three-Component Copper-Catalyzed Coupling/Propargyl-Allenyl Isomerization/[4 + 2] Cyclization Reaction
作者:Jian Cao、Xian Huang
DOI:10.1021/ol102235t
日期:2010.11.5
An interesting sequential three-componentcopper-catalyzed coupling/propargyl-allenyl isomerization/[4 + 2] cyclization reaction, providing a facile synthesis of highly substituted tetrahydro-1H-isoindolones from conjugated vinylic alkynes, imines, and α,β-unsaturated enoic acid chlorides is reported. The most attractive feature of this transformation is that three stereogenic centers could be generated