Lewis Acid Catalyzed Cascade Reaction to Carbazoles and Naphthalenes via Dehydrative [3 + 3]-Annulation
作者:Shaoyin Wang、Zhuo Chai、Yun Wei、Xiancui Zhu、Shuangliu Zhou、Shaowu Wang
DOI:10.1021/ol501605h
日期:2014.7.3
A novel Lewisacidcatalyzed dehydrative [3 + 3]-annulation of readily available benzylic alcohols and propargylic alcohols was developed to give polysubstituted carbazoles and naphthalenes in moderate to good yields with water as the only byproduct. The reaction was presumed to proceed via a cascade process involving Friedel–Crafts-type allenylation, 1,5-hydride shift, 6π-eletrocyclization, and Wagner–Meerwein
Synthesis of polysubstituted 1,2-dihydroquinolines and indoles via cascade reactions of arylamines and propargylic alcohols catalyzed by FeCl<sub>3</sub>·6H<sub>2</sub>O
作者:Min Shao、Yunjun Wu、Zhijun Feng、Xiaoxia Gu、Shaoyin Wang
DOI:10.1039/c5ob02658j
日期:——
friendly and high-yielding route from inexpensive starting materials to 1,2-dihydroquinolines has been developed. This procedure proceeded via a cascade Friedel–Crafts-type reaction and 6-endo-trig hydroamination under the catalysis of FeCl3·6H2O, involving the formation of two new σ (C–C and C–N) bonds in a single operation for the construction of a 1,2-dihydroquinoline skeleton in good to excellent yields
Iodo(III)-Meyer–Schuster Rearrangement of Propargylic Alcohols Promoted by Benziodoxole Triflate
作者:Roshayed Ali Laskar、Wei Ding、Naohiko Yoshikai
DOI:10.1021/acs.orglett.1c00039
日期:2021.2.5
rearrangement of propargylicalcohols into α,β-unsaturated ketones bearing an α-λ3-iodanyl group. This iodo(III)-Meyer–Schuster rearrangement proceeds under mild conditions and tolerates a variety of functionalized propargylicalcohols, thus complementing previously reported halogen-intercepted Meyer–Schuster rearrangement. The α-λ3-iodanylenones can be utilized for facile Pd-catalyzed cross-coupling for the
A novel and direct synthesis of 1‐aryl‐5‐arylvinyl‐tetrazoles from easily prepared propargylic alcohols and TMSN3 is developed in the presence of TMSCl under mild conditions (TMS=trimethylsilyl). The process involves an allenylazide intermediate, followed by a CC‐bond cleavage and CN‐bond formation to afford the desired products. Moreover, this method offers a good functional‐group applicability