Beta-Amino-Acid derivatives as inhibitors of matrix metalloproteases and TNF-Alpha
申请人:——
公开号:US20020013341A1
公开(公告)日:2002-01-31
The present application describes novel &bgr;-amino acid derivatives of formula I:
1
or pharmaceutically acceptable salt or prodrug forms thereof, wherein A, X, Z, U
a
, X
a
, Y
a
, Z
a
, R
1
, R
2
, R
3
, R
4
, and R
4a
are defined in the present specification, which are useful as metalloprotease and/or as TNF-&agr; inhibitors.
本申请描述了式I的新型β-氨基酸衍生物:
1
或其药用可接受的盐或前药形式,其中A、X、Z、U
a
、X
a
、Y
a
、Z
a
、R
1
、R
2
、R
3
、R
4
和R
4a
在本规范中有定义,这些衍生物可用作金属蛋白酶和/或TNF-α抑制剂。
Palladium-Catalyzed Asymmetric Synthesis of Allylic Fluorides
作者:Matthew H. Katcher、Abigail G. Doyle
DOI:10.1021/ja109120n
日期:2010.12.15
The enantioselective fluorination of readily available cyclic allylic chlorides with AgF has been accomplished using a Pd(0) catalyst and Trost bisphosphine ligand. The reactions proceed with unprecedented ease of operation for Pd-mediated nucleophilic fluorination, allowing access to highly enantioenriched cyclic allylicfluorides that bear diverse functional groups. Evidence that supports a mechanism
Iron-Catalyzed Intramolecular Perezone-Type [5 + 2] Cycloaddition: Access to Tricyclo[6.3.1.0<sup>1,6</sup>]dodecane
作者:Yongjiang Liu、Xiao Wang、Song Chen、Shaomin Fu、Bo Liu
DOI:10.1021/acs.orglett.8b00989
日期:2018.5.18
An iron-catalyzed perezone-type [5 + 2] cycloaddition toward tricyclo[6.3.1.01,6]dodecane scaffolds is presented, furnishing cycloadducts with two new C–C bonds and three to four stereogenic centers generated with typically good yields and excellent diastereoselectivities. Two independent conditions, catalytic FeCl3/PhCO3tBu (0.5 equiv/1 equiv) and stoichiometric FeCl3(2 equiv), have been respectively
Photochemical fluoro-amino etherification reactions of aryldiazoacetates with NFSI under stoichiometric conditions
作者:Feifei He、Chao Pei、Rene M. Koenigs
DOI:10.1039/c9cc08888a
日期:——
Herein, we report on a photochemical three-component reaction of aryldiazoacetates with NFSI and cyclicethers. This method allows the introduction of both fluorine and a short ether sidechain using 1,4-dioxane as solvent in high yields via an ylide pathway as demonstrated by DFT calculations (26 examples, up to 99% yield).
The substituted 4H-pyrans are prepared by reacting either aldehydes or ylidene compounds with suitably substituted .beta.-diketones. The substituted 4H-pyrans according to the invention are suitable as active compounds in medicaments, in particular for the treatment of disorders of the central nervous system.