1,3-Dioxa-[3,3]-sigmatropic Oxo-Rearrangement of Substituted Allylic Carbamates: Scope and Mechanistic Studies
作者:Maddalen Agirre、Sylvain Henrion、Ivan Rivilla、José I. Miranda、Fernando P. Cossío、Bertrand Carboni、José M. Villalgordo、François Carreaux
DOI:10.1021/acs.joc.8b01320
日期:2018.12.21
alkenyl-substituted allylic alcohols with activated isocyanates is reported. The reorganization of bonds is highly dependent on the electron density of the aromatic ring and the nature of isocyanate used. This metal-free tandem reaction from branched allyl alcohols initiated by a carbamoylation reaction and followed by a sigmatropic rearrangement thus offers a new access to (E)-cinnamyl and conjugated (E,E)-diene
Microwave‐Assisted 1,3‐Dioxa‐[3,3]‐Sigmatropic Rearrangement of Substituted Allylic Carbamates: Application to the Synthesis of Novel 1,3‐Oxazine‐2,4‐dione Derivatives
The acceleration of 1,3-dioxa-[3,3]-sigmatropicrearrangement of aryl allylic carbamates under microwave irradiation was described. The implementation of these unconventional thermal conditions allowed the development of an original synthetic route to new heterocycle products such as (E)-5-arylidene-1,3-oxaninane-2,4-diones.
描述了在微波辐射下芳基烯丙基氨基甲酸酯的 1,3-二氧杂环己烷-[3,3]-sigmatropic 重排的加速。这些非常规热条件的实施允许开发新的杂环产品的原始合成路线,例如 ( E )-5-亚芳基-1,3-oxaninane-2,4-二酮。