[EN] TRANS-CYCLOHEPTENES AND HETERO-TRANS-CYCLOHEPTENES FOR BIOORTHOGONAL COUPLING [FR] TRANS-CYCLOHEPTÈNES ET HÉTÉRO-TRANS-CYCLOHEPTÈNES POUR COUPLAGE BIOORTHOGONAL
Stereoselective Synthesis of Cyclic Guanidines by Directed Diamination of Unactivated Alkenes
作者:Artur K. Mailyan、Kyle Young、Joanna L. Chen、Bradley T. Reid、Armen Zakarian
DOI:10.1021/acs.orglett.6b02778
日期:2016.11.4
method for a directed stereoselective guanidinylation of alkenes is described. The guanidine unit can be delivered as an intact fragment by a hydroxy or carboxy group, usually with a high level of stereocontrol. After the guanidine delivery, the directinggroup can be cleaved under exceptionally mild conditions, typically by alcoholysis in the presence of acetic acid. Broad functionalgroup tolerance
Diastereoselectively Complementary C–H Functionalization Enables Access to Structurally and Stereochemically Diverse 2,6-Substituted Piperidines
作者:Gang Wang、Ying Mao、Lei Liu
DOI:10.1021/acs.orglett.6b03372
日期:2016.12.16
The preparation of 2,6-substituted piperidine derivatives through diastereoselective C–H functionalization of corresponding nitrogen heterocycles represents an appealing protocol and yet remains a formidable challenge. Here, we describe a stereochemically complementary oxidative C–H functionalization of N-carbamoyl tetrahydropyridines with a wide variety of building blocks, providing either the cis-
Titanium-Mediated Oxidative Arylation of Homoallylic Alcohols
作者:Kathleen S. Lee、Joseph M. Ready
DOI:10.1002/anie.201007244
日期:2011.2.25
E‐Substituted styrene derivatives are synthesized from terminal olefins and aryl Grignard reagents through TiIV‐mediated oxidative coupling (see scheme). Substrates include homoallylicalcohols containing a range of functional groups and substituted aryl Grignard reagents. The reaction may proceed through aryltitanation followed by β‐hydride elimination; reductive elimination of arene occurs from a
E取代的苯乙烯衍生物是通过Ti IV介导的氧化偶合反应由末端烯烃和芳基格氏试剂合成的(参见方案)。底物包括含有一系列官能团的均烯丙基醇和取代的芳基格氏试剂。该反应可通过芳基钛化反应继之以β-氢化物消除进行。从Ti IV H(芳基)中间体发生芳烃的还原消除。
Group-Selective Ring-Closing Enyne Metathesis: Concentration-Dependent Selectivity Profile of Alkynylsilyloxy-Tethered Dienynes
作者:Sarah V. Maifeld、Reagan L. Miller、Daesung Lee
DOI:10.1021/ja046043n
日期:2004.10.1
Grubbs first- and second-generation catalyst. The remarkable selectivity increase at higher concentration for differentiating between two alkene moieties in nearly identical steric and stereoelectronic environments is believed to be the result of a higher ring-closure rate for smaller-sized ring formation under rapid pre-equilibration of the two alkylidene species generated from either alkene moiety.
Trans-cycloheptenes and hetero-trans-cycloheptenes for bioorthogonal coupling
申请人:Fox Joseph
公开号:US10155777B2
公开(公告)日:2018-12-18
A substituted trans-cycloheptene according to formula (I); wherein: a) Z and L are each selected from the group consisting of SiR1R2, CH2, CHOH, and CHR2; R1 is phenyl or CH3; R2 is phenyl, CH3, (CH2)nCN, or (CH2)nOH, wherein n is an integer from 1 to 5; Ra and Rb are each individually selected from the group consisting of H, OH, and CH3; and Z and L are not both SiR1R2; or b) Z is BocN, L is CH2, Ra is H, and Rb is H; or c) Z is C=0, L is CH2, Ra is H, and Rb is H.
根据式(I)的取代反式环庚烯;其中a) Z 和 L 各自选自由 SiR1R2、CH2、CHOH 和 CHR2 组成的组;R1 是苯基或 CH3;R2 是苯基、 、( )nCN 或 ( )nOH,其中 n 是 1 至 5 的整数;Ra 和 Rb 各自单独选自 H、OH 和 组成的组;且 Z 和 L 不同时是 SiR1R2;或 b) Z 是 BocN,L 是 ,Ra 是 H,Rb 是 H;或 c) Z 是 C=0,L 是 ,Ra 是 H,Rb 是 H。