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。
Regioselective dehydroxytrifluoromethylthiolation of allylic and propargylic alcohols with AgSCF3
作者:Yin-Li Liu、Xiu-Hua Xu、Feng-Ling Qing
DOI:10.1016/j.tetlet.2019.02.045
日期:2019.4
reaction of easily available Morita–Baylis–Hillman (MBH) alcohols with AgSCF3 in the presence of n-Bu4NI and KI affords primary allylic SCF3 products in high yields and excellent regioselectivities. This regioselective dehydroxytrifluoromethylthiolation protocol could also be extended to propargylicalcohols for the preparation of the primary propargylic SCF3 products.
Versatile O- and S-functionalized 1,2,3-triazoliums: ionic liquids for the Baylis–Hillman reaction and ligand precursors for stable MIC-transition metal complexes
作者:Daniel Mendoza-Espinosa、Rodrigo González-Olvera、Cecilia Osornio、Guillermo E. Negrón-Silva、Rosa Santillan
DOI:10.1039/c4nj02076f
日期:——
A series of O- and S-functionalized triazolium salts display high performance in the Baylis–Hillman addition and allow the one-pot formation of MIC-transition metal complexes.
SO<sub>2</sub>F<sub>2</sub> mediated cascade dehydrogenative Morita–Baylis–Hillman reaction of the C(sp<sup>3</sup>)–H of primary alcohols with the C(sp<sup>2</sup>)–H of electron-deficient olefins for the assembly of allylic alcohols
作者:Ying Jiang、Njud S. Alharbi、Bing Sun、Hua-Li Qin
DOI:10.1039/c9ra05346h
日期:——
dehydrogenative Morita–Baylis–Hillman reaction of the C(sp3)–H of primary alcohols with the C(sp2)–H of electron-deficient olefins for forming allylic alcohols mediated by SO2F2 was developed. This method provides a mild process for the preparation of allylic alcohol moieties without the requirement of transition metals.
开发了伯醇的 C(sp 3 )-H 与缺电子烯烃的 C(sp 2 )-H 的级联脱氢 Morita-Baylis-Hillman 反应,以形成由 SO 2 F 2介导的烯丙醇。该方法为制备烯丙醇部分提供了一种温和的方法,无需过渡金属。
An Improved Protocol for the Morita‐Baylis‐Hillman Reaction Allows Unprecedented Broad Synthetic Scope
作者:Nilton S. Camilo、Hugo Santos、Lucas A. Zeoly、Fábio S. Fernandes、Manoel T. Rodrigues、Thiago S. Silva、Samia R. Lima、José Cláudio Serafim、Aline S. B. de Oliveira、Arthur G. Carpanez、Giovanni W. Amarante、Fernando Coelho
DOI:10.1002/ejoc.202101448
日期:2022.3.7
By the combination of DABCO and aceticacid under solvent-free conditions, the Morita-Baylis-Hillman reaction rate of both activated and non-activated aldehydes increased significantly. The disclosed procedure is operationally simple and is compatible with a wide array of both nucleophilic and electrophilic reaction partners.