Facile One-Pot Transformation of Phenols into<i>o</i>-Cyanophenols
作者:Yuhta Nakai、Katsuhiko Moriyama、Hideo Togo
DOI:10.1002/ejoc.201402817
日期:2014.9
The treatment of phenols with paraformaldehyde in the presence of MgCl2 and Et3N in THF at 80 °C, followed by reaction with molecular iodine and aq. ammonia at room temperature provided the corresponding o-cyanophenols in moderate to good yields. The present reaction is a one-pottransformation of phenols into o-cyanophenols using much less expensive reagents than are typically used; the reaction is
在 MgCl2 和 Et3N 的四氢呋喃中,在 80 °C 下用多聚甲醛处理苯酚,然后与分子碘和水溶液反应。氨在室温下以中等至良好的产率提供相应的邻氰基酚。本反应是使用比通常使用的试剂便宜得多的试剂将苯酚一锅法转化为邻氰基苯酚;该反应不含过渡金属和氰化物。在我们从对溴苯酚制备非布司他的过程中强调了该反应的效用。
The Catalyst-Controlled Regiodivergent Chlorination of Phenols
作者:Sean M. Maddox、Andrew N. Dinh、Felipe Armenta、Joann Um、Jeffrey L. Gustafson
DOI:10.1021/acs.orglett.6b02650
日期:2016.11.4
overcome the innate para-selectivity of electrophilic phenolchlorination, yielding ortho-chlorinated phenols that are not readily obtainable via canonical electrophilic chlorinations. Conversely, a phosphine sulfide derived from 2,2′-Bis(diphenylphosphino)-1,1′-binaphthyl (BINAP) was found to enhance the innate para-preference of phenolchlorination.
Phenolate‐Induced N−O Bond Formation versus Tiemann‐Type Rearrangement for the Synthesis of 3‐Aminobenzisoxazoles and 2‐Aminobenzoxazoles
作者:Benedikt Hufnagel、W. Felix Zhu、Hanna M. Franz、Ewgenij Proschak、Victor Hernandez‐Olmos
DOI:10.1002/open.202200252
日期:2022.12
intramolecular N−O bond formation and the competitive Tiemann-type rearrangement via oxadiazolones as cyclic nitrenoid precursors were developed. Selectivity for the two isomers was remarkably influenced by steric and electronic effects, but tetrabutylammonium chloride (TBACl) was discovered as an effective additive to promote the Tiemann-type rearrangement over N−O bond formation.
Nouveaux phénols di-ortho substitués dont une des substitutions est un hétérocycle, leur procédé de préparation, médicaments les contenant, notamment anti-hypertenseurs et nouveaux intermédiaires de synthèse
申请人:CARPIBEM (CENTRE D'ACTIVITE ET DE
RECHERCHE PHARMACEUTIQUE INDUSTRIELLE
BIOLOGIQUE ET MEDICALE)
Société Anonyme dite:
公开号:EP0070779A2
公开(公告)日:1983-01-26
L'invention concerne de nouveaux composés de formule:
Anti-hypertenseurs.
本发明涉及新的式化合物:
抗高血压剂。
Compound, light-emitting element, display device, electronic device, and lighting device
申请人:Semiconductor Energy Laboratory Co., Ltd.
公开号:US10586931B2
公开(公告)日:2020-03-10
A compound includes a benzofuropyrimidine skeleton or a benzothienopyrimidine skeleton, a first substituent, and a second substituent. Each of the first substituent and the second substituent includes a furan skeleton, a thiophene skeleton, or a pyrrole skeleton. The first substituent is bonded to a pyrimidine ring included in the benzofuropyrimidine skeleton or a pyrimidine ring included in the benzothienopyrimidine skeleton. The second substituent is bonded to a benzene ring included in the benzofuropyrimidine skeleton or a benzene ring included in the benzothienopyrimidine skeleton. The light-emitting element includes the compound.