Ozonolyse von Enolethern. 9. Synthese und Ozonolyse von 5,6,7,8-Tetrahydrochroman
摘要:
The regioselectivity of the transfer of three oxygens of ozone to the olefinic carbons of the rigid substituted enol ether 5,6,7,8-tetrahydrochroman (3) is proved by isolation of omega-caprinolactone 5 instead of an earlier claimed oxacyclode-canone 4.
General Allylic C–H Alkylation with Tertiary Nucleophiles
作者:Jennifer M. Howell、Wei Liu、Andrew J. Young、M. Christina White
DOI:10.1021/ja500726e
日期:2014.4.16
A general method for intermolecular allylic C–H alkylation of terminal olefins with tertiary nucleophiles has been accomplished employing palladium(II)/bis(sulfoxide) catalysis. Allylic C–H alkylation furnishes products in good yields (avg. 64%) with excellent regio- and stereoselectivity (>20:1 linear:branched, >20:1 E:Z). For the first time, the olefin scope encompasses unactivated aliphatic olefins
A Sulfoxide-Promoted, Catalytic Method for the Regioselective Synthesis of Allylic Acetates from Monosubstituted Olefins via C−H Oxidation
作者:Mark S. Chen、M. Christina White
DOI:10.1021/ja039107n
日期:2004.2.1
promote C-H oxidation versus Wacker oxidation chemistry and to control the regioselectivity in the C-H oxidation products. A catalytic method for the direct C-H oxidation of monosubstituted olefins to linear (E)-allylic acetates in high regio- and stereoselectivities and preparatively useful yields is described. The method using benzoquinone as the stoichiometric oxidant and 10 mol % of Pd(OAc)2 or Pd(O2CCF3)2
Alkene hydrosilylation catalyzed by easily assembled Ni(<scp>ii</scp>)-carboxylate MOFs
作者:Zhikun Zhang、Lichen Bai、Xile Hu
DOI:10.1039/c9sc00126c
日期:——
Easily-assembled Ni MOFs are efficient and robust catalysts for alkene hydrosilylation.
易于组装的Ni MOFs对烯烃氢硅烷化反应具有高效和稳健的催化作用。
Aerobic Linear Allylic C–H Amination: Overcoming Benzoquinone Inhibition
作者:Christopher C. Pattillo、Iulia I. Strambeanu、Pilar Calleja、Nicolaas A. Vermeulen、Tomokazu Mizuno、M. Christina White
DOI:10.1021/jacs.5b11294
日期:2016.2.3
linear allylic C-H amination reaction is reported under palladium(II)/bis-sulfoxide/Brønsted base catalysis. The reaction operates under preparative, operationally simple conditions (1 equiv of olefin, 1 atm O2 or air) with reduced Pd(II)/bis-sulfoxide catalyst loadings while providing higher turnovers and product yields than systems employing stoichiometric benzoquinone (BQ) as the terminal oxidant