Accessing <i>para</i>-Alkylphenols via Iridium-Catalyzed Site-Specific Deoxygenation of Alcohols
作者:Jing Wang、Tingting Wang、Hongguang Du、Ning Chen、Jiaxi Xu、Zhanhui Yang
DOI:10.1021/acs.joc.3c01294
日期:2023.9.1
An iridium-catalyzed and phenol-directed deoxygenation of benzylic alcohols comes as an alternative access to 4-alkylphenols, featuring low catalyst loading (S/C up to 20,000, TOF up to 12,400 h–1), high functionality compatibility, and excellent site-selectivity. The applications in late-stage modification of steroids and gram-scale total synthesis of a Gastrodia elata extract are highlighted. Mechanistically
铱催化和苯酚引导的苄醇脱氧是制备 4-烷基苯酚的替代方案,具有催化剂负载量低(S / C高达 20,000,TOF 高达 12,400 h –1)、高功能兼容性和优异的现场性等特点-选择性。重点介绍了天麻提取物在类固醇后期修饰和克级全合成中的应用。从机理上讲,醌甲基化物的中间作用控制了位点选择性,氢化铱的形成作为限速步骤。
Method of alkylating phenols
申请人:DOW CHEMICAL CO
公开号:US02125310A1
公开(公告)日:1938-08-02
AXMEDOVA, R. A.;FARADZHEVA, EH. Z.;SARDAROVA, T. A.;MUTAFAEVA, P. R., SINTEZY I ISSLED. FUNKTS.-ZAMESHCHEN. SOED., BAKU,(1988) S. 35-37
作者:AXMEDOVA, R. A.、FARADZHEVA, EH. Z.、SARDAROVA, T. A.、MUTAFAEVA, P. R.
DOI:——
日期:——
Kraftübertragungsfluide
申请人:BAYER AG
公开号:EP0047448B1
公开(公告)日:1983-09-21
COMPOSITION FOR FORMING BASE FILM FOR LITHOGRAPHY AND METHOD FOR FORMING MULTILAYER RESIST PATTERN
申请人:Oguro Dai
公开号:US20100316950A1
公开(公告)日:2010-12-16
A composition for forming an underlayer film for lithography for imparting excellent optical characteristics and etching resistance to an underlayer film for lithography, an underlayer film being formed of the composition and having a high refractive index (n) and a low extinction coefficient (k), being transparent, having high etching resistance, containing a significantly small amount of a sublimable component, and a method for forming a pattern using the underlayer film are provided. The composition for forming an underlayer film contains a naphthalene formaldehyde polymer having a specific unit obtained by reacting naphthalene and/or alkylnaphthalene with formaldehyde, and an organic solvent.