Tandem Oxidative Ring-Opening/Cyclization Reaction in Seconds in Open Atmosphere for the Synthesis of 1-Tetralones in Water–Acetonitrile
作者:Jingxian Fang、Lesong Li、Chu Yang、Jinping Chen、Guo-Jun Deng、Hang Gong
DOI:10.1021/acs.orglett.8b03246
日期:2018.11.16
A mild and practical tandem oxidative ring-opening/cyclization reaction mediated by Ce4+ for the synthesis of 1-tetralones is presented. This rapid transformation was completed within 30 s and conducted in an open reactor at 0 °C in a water–acetonitrile mixture. Various cyclobutanol derivatives are transformed into desired products in good to high yields, and this reaction can be easily scaled up to
Non-Acidic Mediated Friedel-Craft Reaction of Thiophene Using EtAlCl2
作者:Halil Ünver、Mutluhan Biyikoglu、Adnan Bulut
DOI:10.14233/ajchem.2013.15607
日期:——
Since alkyl Lewis acids are Brønsted bases, they give a non-acidic reaction media. In this context, acylation of thiophene is investigated in the presence of EtAlCl2 and non-acidic media. Besides 8 examples of thiophene, one example for pyrrole is synthesized in moderate to high yields (up to 99 %).
Direct Acylation of Unactivated Alkyl Halides with Aldehydes through N‐Heterocyclic Carbene Organocatalysis
作者:Qing‐Zhu Li、Rong Zeng、Peng‐Shuai Xu、Xin‐Hang Jin、Chuan Xie、Qi‐Chun Yang、Xiang Zhang、Jun‐Long Li
DOI:10.1002/anie.202309572
日期:2023.10.2
with unactivated alkyl halides in the presence of an NHC organocatalyst, thus enabling the rapid synthesis of various ketonesfrom readily available starting materials under mild conditions. This method was also applied to the late-stage functionalization of pharmaceutical derivatives. Mechanistic investigations suggest a closed-shell nucleophilic substitution mechanism for this organocatalytic reaction