A concise synthesis of indene-based polycyclic compounds via FeCl3-catalyzed cascade cyclization

2018 ◽  
Vol 5 (7) ◽  
pp. 1165-1169 ◽  
Author(s):  
Xiang Su ◽  
Panpan Wu ◽  
Wenfeng Liu ◽  
Chao Chen
Keyword(s):  
Transition Metal ◽  
Metal Salt ◽  
Bond Cleavage ◽  
Environment Friendly ◽  
Polycyclic Compounds ◽  
Propargylic Alcohols ◽  
Cascade Cyclization ◽  
Transition Metal Salt ◽  
Earth Abundant

An efficient and straightforward protocol to complex indene-based polycyclic compounds via the cascade cyclization of propargylic alcohols and alkenes was developed. The catalyst FeCl3, as an Earth-abundant and environment friendly transition metal salt, is attractive. This reaction proceeded through unusual C–C bond cleavage.

scholarly journals Effect of Shale Ash-Based Catalyst on the Pyrolysis of Fushun Oil Shale

Catalysts ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 900
Author(s):  
Hao Lu ◽  
Fengrui Jia ◽  
Chuang Guo ◽  
Haodan Pan ◽  
Xu Long ◽  
...  
Keyword(s):  
Activation Energy ◽  
Transition Metal ◽  
Oil Shale ◽  
Metal Salt ◽  
Metal Salts ◽  
Aliphatic Hydrocarbons ◽  
Shale Oil ◽  
Transition Metal Salt ◽  
Transition Metal Salts ◽  
Shale Ash

The effect of shale ash (SA)-based catalysts (SA as carriers to support several transition metal salts, such as ZnCl2, NiCl2·6H2O, and CuCl2·2H2O) on oil shale (OS) pyrolysis was studied. Results showed that SA promoted OS pyrolysis, and the optimum weight ratio of OS:SA was found to be 2:1. The SA-supported transition metal salt catalyst promoted the OS pyrolysis, and the catalytic effect increased with increasing load of the transition metal salt within 0.1–3.0 wt%. The transition metal salts loaded on the SA not only promoted OS pyrolysis and reduced the activation energy required but also changed the yield of pyrolysis products (reduced shale oil and semi-coke yields and increased gas and loss yield). SA-supported 3 wt% CuCl2·2H2O catalyst not only exhibited the highest ability to reduce the activation energy in OS pyrolysis (32.84 kJ/mol) but also improved the gas and loss yield, which was 4.4% higher than the uncatalyzed reaction. The supporting transition metal salts on the SA also increased the content of short-chain hydrocarbons in aliphatic hydrocarbons in shale oil and catalyzed the aromatization of aliphatic hydrocarbons to form aromatic hydrocarbons. The catalytic activity of the transition metal salt on the SA-based catalyst for OS pyrolysis decreased in the order of CuCl2·2H2O > NiCl2·6H2O > ZnCl2.

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