Hydride Reductions of 1-Phenyl-1-nonen-3 -one: Mass Spectrometry of 1-Phenyl-1-nonen-3-ols and Relative Stereochemistry of the Diastereoisomeric 4-Dimethylaminomethyl-1-Phenyl-1-nonen-3-ols
Catalyst-Free Dehydrative α-Alkylation of Ketones with Alcohols: Green and Selective Autocatalyzed Synthesis of Alcohols and Ketones
作者:Qing Xu、Jianhui Chen、Haiwen Tian、Xueqin Yuan、Shuangyan Li、Chongkuan Zhou、Jianping Liu
DOI:10.1002/anie.201308642
日期:2014.1.3
Direct dehydrative α‐alkylation reactions of ketones with alcohols are now realized under simple, practical, and green conditions without using external catalysts. These catalyst‐free autocatalyzed alkylation methods can efficiently afford useful alkylated ketone or alcohol products in a one‐pot manner and on a large scale by CC bond formation of the in situ generated intermediates with subsequent
Manganese-Catalyzed β-Alkylation of Secondary Alcohols with Primary Alcohols under Phosphine-Free Conditions
作者:Tingting Liu、Liandi Wang、Kaikai Wu、Zhengkun Yu
DOI:10.1021/acscatal.8b01960
日期:2018.8.3
secondary alcohols with primary alcohols under phosphine-free conditions. The β-alkylated secondary alcohols were obtained in moderate to good yields with water formed as the byproduct through a borrowinghydrogen pathway. β-Alkylation of cholesterols was also effectively achieved. The present protocol provides a concise atom-economical method for C–C bond formationfrom primary and secondary alcohols.
Ruthenium Phosphine–Pyridone Catalyzed Cross-Coupling of Alcohols To form α-Alkylated Ketones
作者:Apurba R. Sahoo、Gummidi Lalitha、V. Murugesh、Christian Bruneau、Gangavaram V. M. Sharma、Surisetti Suresh、Mathieu Achard
DOI:10.1021/acs.joc.7b02042
日期:2017.10.6
An efficient and green route to access diverse functionalized ketones via dehydrogenative–dehydrative cross-coupling of primary and secondary alcohols is demonstrated. Selective and tunable formation of ketones or alcohols is catalyzed by a recently developed proton responsive ruthenium phosphine–pyridone complex. Light alcohols such as ethanol could be used as alkylating agents in this methodology
Regioselective Hydrohydroxyalkylation of Styrene with Primary Alcohols or Aldehydes via Ruthenium-Catalyzed C−C Bond Forming Transfer Hydrogenation
作者:Hongde Xiao、Gang Wang、Michael J. Krische
DOI:10.1002/anie.201609056
日期:2016.12.23
Transferhydrogenative coupling of styrene with primaryalcohols using the precatalyst HClRu(CO)(PCy3)2 modified by AgOTf or HBF4 delivers branched or linear adducts from benzylic or aliphatic alcohols, respectively. Related 2‐propanol mediated reductive couplings also are described.
A new Mn‐catalyzed alkylation of secondary alcohols with non‐activated alcohols is presented. The use of a stable and well‐defined manganese pincer complex, stabilized by a PNN ligand, together with a catalytic amount of base enabled the conversion of renewable alcohol feedstocks to a broad range of higher‐value alcohols in good yields with water as the sole byproduct. The strategy eliminates the need