Allylation of Unactivated Ketones by Tetraallyltin Accelerated by Phenol. Application to Asymmetric Allylation Using a Tetraallyltin-BINOL System
作者:Makoto Yasuda、Noriko Kitahara、Tatsuya Fujibayashi、Akio Baba
DOI:10.1246/cl.1998.743
日期:1998.8
The tetraallyltin-phenol system was mild and effective for allylation of unactivated ketones, giving tertiary alcohols in high yields. The asymmetric allylation was achieved by a tetraallyltin-homochiral BINOL (1,1′-bi-2-naphthol) system. The addition of methanol raised the enantioselectivity to afford the tertiary homoallylic alcohol up to 60% ee.
ALDEHYDE-SELECTIVE WACKER-TYPE OXIDATION OF UNBIASED ALKENES
申请人:CALIFORNIA INSTITUTE OF TECHNOLOGY
公开号:US20140316149A1
公开(公告)日:2014-10-23
This disclosure is directed to methods of preparing organic aldehydes, each method comprising contacting a terminal olefin with an oxidizing mixture comprising:
(a) a dichloro-palladium complex;
(b) a copper complex;
(c) a source of nitrite;
under aerobic reaction conditions sufficient to convert at least a portion of the terminal olefin to an aldehyde.
SnCl2-mediated carbonyl allylation of aldehydes and ketones in ionic liquid
作者:Long Tang、Li Ding、Wei-Xing Chang、Jing Li
DOI:10.1016/j.tetlet.2005.11.022
日期:2006.1
In ionicliquid [bmim]BF4, SnCl2·2H2O acts as an inexpensive and efficient metal salt for carbonyl allylation. By applying ionicliquid, some previously reported serious operational problems associated with the SnCl2-mediated allylation reaction are avoided. Furthermore, ketones, which are less reactive than aldehydes, can also be allylated in high yields with this system.
Catalyst-Controlled Wacker-Type Oxidation: Facile Access to Functionalized Aldehydes
作者:Zachary K. Wickens、Kacper Skakuj、Bill Morandi、Robert H. Grubbs
DOI:10.1021/ja411749k
日期:2014.1.22
The aldehyde-selective oxidation of alkenes bearing diverse oxygen groups in the allylic and homoallylic position was accomplished with a nitrite-modifiedWackeroxidation. Readily available oxygenated alkenes were oxidized in up to 88% aldehyde yield and as high as 97% aldehyde selectivity. The aldehyde-selective oxidation enabled the rapid, enantioselective synthesis of an important pharmaceutical
COPPER (I)-CATALYZED REACTION OF ISOPRENE BROMOHYDRIN WITH ORGANOLITHIUM REAGENT
作者:Shuki Araki、Yasuo Butsugan
DOI:10.1246/cl.1980.185
日期:1980.2.5
The reaction of isoprene bromohydrin (1-bromo-2-methyl-3-buten-2-ol) (1) with ethyl-, propyl- and butyllithium in the presence of copper (I) iodide leads to the exclusive formation of the vinyl group migrated 2-alkyl-4-penten-2-ols (3d–3f), in contrast to the reaction with methyl-, phenyl- and benzyllithium, which yields the corresponding 2-methyl-4-substituted-2-buten-l-ols (2a–2c).