Copper-Catalyzed Stereospecific C–S Coupling Reaction of Enantioenriched Tertiary Benzylic Amines via in Situ Activation with Methyl Triflate
作者:Wenlong Jiang、Nutao Li、Lihong Zhou、Qingle Zeng
DOI:10.1021/acscatal.8b03032
日期:2018.11.2
1-(thiophen-2-yl)ethanamine), and aminoacid esters containing a benzylamine moiety, are highly efficient substrates, and their chirality is efficiently transferred to the products (94–99% ee). The absolute configurations of the products are predictable and follow the pattern of SN2-type substitutions; an inversion of the absolute configuration of the tertiary amines occurs during the C–S coupling reaction. Not only
Reactivity of Cycloplatinated Amine Complexes: Intramolecular C–C Bond Formation, C–H Activation, and PPh<sub>2</sub> Migration in Coordinated Alkynylphosphines
作者:Kien-Wee Tan、Xiang-Yuan Yang、Yongxin Li、Yinhua Huang、Sumod A. Pullarkat、Pak-Hing Leung
DOI:10.1021/om300976y
日期:2012.12.10
reaction occurred in which a new carbon–carbon bond was formed between the aromatic γ-carbon of the ortho-platinated chiral phenylamine and the α-carbon of the (Ph2P)–Cα≡Cβ–(R2) ligand. The (Ph2P) moiety migrated to the neighboring β-carbon during the coupling reaction. By the judicious selection of the substituents on the alkynylphoshine along with deliberate introduction of selected chirality on the
单体邻-platinated络合物[PT R 1 CH(1-C 6 H ^ 4)NME 2 - ç,Ñ } 博士2 PC≡CR 2 } CL](R 1 =甲基,乙基; R 2 = Me中, PH)与反式- N,P分别从区域专一二聚体[PT之间的反应而得到的几何结构2(μ-Cl)的2 R 1 CH(1-C 6 H ^ 4)NME 2 - ç,ñ } 2]和相应的炔基膦以高收率使用。膦配合物在固态和溶液中都是高度稳定的。但是,在存在额外的Pt(II)离子的情况下,发生了分子内偶联反应,其中在原镀的手性苯胺的芳族γ-碳和(Ph的α-碳之间形成了新的碳-碳键。2 P)-C α ≡C β - (R 2)的配体。(Ph 2 P)部分在偶联反应过程中迁移至相邻的β-碳。通过明智地选择炔基膦上的取代基以及在邻位上故意引入选择的手性铂苯胺,偶联反应和(Ph 2 P)迁移是通过涉及Pt-亚乙烯基中间体的缔合分子内机制进行的。
Process for the manufacture of bridged monobactam intermediates
申请人:Muller Marc
公开号:US20110178291A1
公开(公告)日:2011-07-21
A process for manufacturing a compound of Formula (I) which has cis-conformation and wherein R1 represents a 1-phenyl-C
1
-C
4
alkyl or 1-naphthyl-C
1
-C
4
alkyl group, wherein the phenyl or naphthyl moiety of R1 is unsubstituted or substituted with one or more C
1
-C
4
alkoxy groups and the carbon atoms in 2-, 3-, and/or 4-position of the alkyl part of R1 are, independently of the phenyl or naphthyl moiety of R1 and independently of one another, unsubstituted or substituted with C
1
-C
4
alkoxy and/or silyloxy or, preferably, are unsubstituted or substituted with one C
1
-C
4
alkoxy group and/or silyloxy group per carbon atom, and R2 represents a C
1
-C
6
alkyl group or an unsubstituted or substituted benzyl group, in which process a compound of Formula (II) wherein R3 represents a C
1
-C
6
alkyl group or an unsubstituted or substituted benzyl group, and R1 and R2 have the same meaning as in formula (I); is treated with a base at a temperature of 0° C. or less in a liquid aprotic solvent for a time period sufficient to obtain the compound of formula (I).
PROCESS FOR THE MANUFACTURE OF BRIDGED MONOBACTAM INTERMEDIATES
申请人:Muller Marc
公开号:US20130274503A1
公开(公告)日:2013-10-17
C1-C6Alkyloxy- or benzyloxy-carbonyl esters of -3-[(E)-(1-phenyl or naphthyl C1-C4alkyl)-imino]-propyl}-amino)-acetic acid, which are intermediates for producing known bridged monobactam compounds useful in the treatment of bacterial infections.
The present invention provides compounds useful, for example, for treating metabolic disorders in a subject. Such compounds have the general formula I:
where the definitions of the variables are provided herein. The present invention also provides compositions that include, and methods for using, the compounds in preparing medicaments and for treating metabolic disorders such as, for example, type II diabetes.