1,2-Thiazines: One-Pot Syntheses Utilizing Mono and Diaza Analogs of Sulfones
作者:Rebekka Anna Bohmann、Yuto Unoh、Masahiro Miura、Carsten Bolm
DOI:10.1002/chem.201600725
日期:2016.5.10
the regioselective synthesis of 1,2‐thiazines, starting from propargyl ketones and NH‐sulfoximines or NH‐sulfondiimines, has been developed. Under mild and operationally simple reaction conditions previously unprecedented 1,2‐thiazine 1‐imide and 1‐oxide derivatives are formed in good to excellent yields. The products represent heterocyclic buildingblocks, readily modifiable by a regioselective C−H
Palladium-Catalyzed CN Cross-Coupling of<i>N′</i>-Monosubstituted Sulfondiimines with Aryl Bromides
作者:Mathieu Candy、Rebekka Anna Bohmann、Carsten Bolm
DOI:10.1002/adsc.201200754
日期:2012.11.12
general method for the N-arylation of sulfondiimines with arylbromides using tris(dibenzylideneacetone)dipalladium(0) [Pd2(dba)3] and 2-dicyclohexylphosphino-2′,6′-diisopropoxybiphenyl (RuPhos) as catalyst system was developed. A new benzothiazine was obtained, and a protocol for the cleavage of para-methoxyphenyl (PMP) groups in PMP-protected sulfondiimines has been found, which provides access to
Regioselective Syntheses of 1,2‐Benzothiazine 1‐Imines by Rhodium‐Catalyzed Annulation Reactions of Sulfondiimines
作者:Rebekka Anna Bohmann、Jan‐Hendrik Schöbel、Yuto Unoh、Masahiro Miura、Carsten Bolm
DOI:10.1002/adsc.201900106
日期:2019.4.23
prepared from sulfondiimines by regioselective rhodium‐catalyzed annulationreactions with diazo keto esters and α‐substituted (pseudo)halo acetophenones as coupling partners. A representative product was characterized by single crystal X‐ray structure analysis, and the applicability of the resulting three‐dimensional heterocycles to Buchwald‐Hartwig‐type amination reactions is shown.