One-Pot Synthesis and Conformational Analysis of Six-Membered Cyclic Iodonium Salts
作者:Lucien D. Caspers、Julian Spils、Mattis Damrath、Enno Lork、Boris J. Nachtsheim
DOI:10.1021/acs.joc.0c01125
日期:2020.7.17
diphenylmethane scaffolds, which are subsequently oxidized and cyclized to the corresponding dibenzo[b,e]iodininium salts. Based on NMR investigations and density functional theory (DFT) calculations, we could verify the so-far-undescribed existence of two stable isomers in cyclic iodoniumsalts substituted with aliphatic side chains in the carbon bridge.
[EN] SUBSTITUTED AZADIBENZOCYCLOOCTYNE COMPOUNDS AND THEIR USE IN METAL-FREE CLICK REACTIONS<br/>[FR] COMPOSÉS AZADIBENZOCYCLOOCTYNE SUBSTITUÉS ET LEUR UTILISATION DANS DES RÉACTIONS « CLICK » SANS MÉTAL
申请人:STICHTING KATHOLIEKE UNIV
公开号:WO2014189370A1
公开(公告)日:2014-11-27
The invention relates to a substituted azadibenzocyclooctyne compound according to Formula (5): The invention also relates to a conjugate wherein a substituted azadibenzocyclooctyne according to the invention is conjugated to a label, and to the use of these conjugates for bioorthogonal labeling, imaging or modification of a target molecule, e.g. surface modification. The invention further relates to a method for the modification of a target molecule, wherein a conjugate according to the invention is reacted with a compound comprising a 1,3-dipole or a 1,3-(hetero)diene.
Regioselectivity Influences in Platinum-Catalyzed Intramolecular Alkyne O–H and N–H Additions
作者:Jeff P. Costello、Eric M. Ferreira
DOI:10.1021/acs.orglett.9b03557
日期:2019.12.20
The steric and electronic drivers of regioselectivity in platinum-catalyzed intramolecular hydroalkoxylation are elucidated. A branch point is found that divides the process between 5-exo and 6-endo selective processes, and enol ethers can be accessed in good yields for both oxygen heterocycles. The main influence arises from an electronic effect, where the alkyne substituent induces a polarization
Efficient Synthesis of Isothiochromene Derivatives by Pd-Catalyzed Hydrothiolation Reaction
作者:Jie Feng、Meifang Lv、Guoping Lu、Chun Cai
DOI:10.1002/ejoc.201402611
日期:2014.8
An efficient method for the preparation of isothiochromenederivatives through the palladium-catalyzed intramolecular hydrothiolationreaction of halides and thiourea is reported. Two carbon–sulfur bonds are formed in this one-pot palladium-catalyzed cascade reaction. This new protocol is free from foul-smelling thiols and operates under mild conditions to give isothiochromenederivatives in excellent
Enantioselective Palladium-Catalyzed Heck-Heck Cascade Reactions: Ready Access to the Tetracyclic Core of Lycorane Alkaloids
作者:Estibaliz Coya、Nuria Sotomayor、Esther Lete
DOI:10.1002/adsc.201500431
日期:2015.10.12
A rapid and efficient access to a wide variety of enantiomerically enriched C-11b substituted lycorane analogues can be achieved via a catalytic asymmetric Heck–Heck 6-exo/6-endo cascadereaction in the presence of (R)-BINAP.