Chiral Calcium Complexes as Brønsted Base Catalysts for Asymmetric Addition of α-Amino Acid Derivatives to α,β-Unsaturated Carbonyl Compounds
作者:Susumu Saito、Tetsu Tsubogo、Shū Kobayashi
DOI:10.1021/ja0709730
日期:2007.5.1
promote the catalyticasymmetric 1,4-addition reactions and [3+2] cycloaddition reactions of α-amino acidderivatives with α,β-unsaturated carbonyl compounds have been developed. The reactions proceeded smoothly in the presence of 5−10 mol % of the chiral calcium catalyst to afford the desired adducts in high yields with high diastereo- and enantioselectivities. A wide range of α,β-unsaturated esters and
[EN] BIFUNCTIONAL MOLECULES CONTAINING AN E3 UBIQUITINE LIGASE BINDING MOIETY LINKED TO A BCL6 TARGETING MOIETY<br/>[FR] MOLÉCULES BIFONCTIONNELLES CONTENANT UNE FRACTION DE LIAISON À L'UBIQUITINE LIGASE E3 LIÉE À UNE FRACTION CIBLANT BCL6
申请人:ARVINAS OPERATIONS INC
公开号:WO2021077010A1
公开(公告)日:2021-04-22
Bifunctional compounds, which find utility as modulators of B-cell lymphoma 6 protein (BCL6; target protein), are described herein. In particular, the bifunctional compounds of the present disclosure contain on one end a Von Hippel-Lindau, cereblon, Inhibitors of Apotosis Proteins or mouse double-minute homolog 2 ligand that binds to the respective E3 ubiquitin ligase and on the other end a moiety which binds the target protein, such that the target protein is placed in proximity to the ubiquitin ligase to effect degradation (and inhibition) of target protein. The bifunctional compounds of the present disclosure exhibit a broad range of pharmacological activities associated with degradation/inhibition of target protein. Diseases or disorders that result from aggregation or accumulation of the target protein are treated or prevented with compounds and compositions of the present disclosure.
Method for Preparation of Piperazindione Derivatives
申请人:Zierke Thomas
公开号:US20110144336A1
公开(公告)日:2011-06-16
A process for preparing piperazinedione derivatives of the formula I
in which
R
1
is hydrogen, alkyl, alkenyl, alkynyl and alkylcarbonyl,
R
2
is hydrogen, alkyl, alkenyl, C
3
-C
4
-alkynyl and C(═O)R
11
,
R
3
, R
4
are each hydrogen, alkyl and haloalkyl, where the groups may be substituted, which comprises reacting amines of the formula II
H
2
N—R
1
II
in which
R
1
is hydrogen and alkyl which may optionally be substituted with N-acylated amino acid derivatives of the formula III
in which
X is halogen,
Y is halogen, alkoxy or phenyloxy which may be substituted and
R
2
, R
3
and R
4
are each as defined at the outset,
under basic conditions in an aqueous solvent.
One Stone Two Birds—Enantioselective Bimetallic Catalysis for<scp>α‐Amino</scp>Acid Derivatives with an Allene Unit
作者:Junzhe Xiao、Haibo Xu、Xiaohong Huo、Wanbin Zhang、Shengming Ma
DOI:10.1002/cjoc.202100002
日期:2021.7
3-butadienyl α-amino acid derivatives in high to excellent yields with excellent enantioselectivities has been developed. The synthetic versatility of this reaction has been demonstrated by gram-scale synthesis, a catalytic enantioselective synthesis of naturally occurring (S)-2-amino-4,5-hexadienoic acid A, and conversions to several useful chemicals, such as optically active α-amino acids, β-amino alcohols
通过协同双金属 Pd/Cu 催化对无环和环状 α-亚氨基羧酸盐进行高度对映选择性 2,3-烯丙基化,使用相同的市售 ( R , R p ) -i Pr-FOXAP(也称为 Phosferrox, ( R , R ) -[2-(4'- i-丙基恶唑啉-2'-基)二茂铁基]二苯基膦)配体用于提供光学活性的 2,3-丁二烯基 α-氨基酸衍生物,收率高至极好,具有极好的对映选择性. 该反应的合成多功能性已通过克级合成证明,这是一种天然存在的催化对映选择性合成(S)-2-氨基-4,5-己二烯酸 A,并转化为几种有用的化学物质,例如光学活性的 α-氨基酸、β-氨基醇、带有丙二烯部分的潜在手性恶唑啉配体和双环酮化合物。基于关键钯预催化剂的分离和控制实验,已经广泛研究了涉及两种金属和单个手性配体的作用的机制。
Inter- and intramolecular addition of ester anions to nicotinium salts
作者:Martin J. Wanner、Gerrit Jan Koomen、Upendra K. Pandit