[6 + 3] Annulations of Morita–Baylis–Hillman Carbonates and Dicyanoheptafulvene

2021 ◽  
Author(s):  
Yang Song ◽  
Ruo-Ling Jia ◽  
Shi Deng ◽  
Long-Wei Yang ◽  
Qing-Ling Liu
Keyword(s):  
Lewis Base ◽  
Base Catalyst

An [6 + 3] annulation reaction of Morita-Baylis-Hillman carbonates and dicyanoheptafulvene is accomplished by employing commercially available triphenylphosphine as the Lewis base catalyst. A spectrum of densely functionalized bicyclo[4.3.1]decane architectures...

Synthesis of hydrosilanes via Lewis-base-catalysed reduction of alkoxy silanes with NaBH4

2019 ◽  
Vol 55 (42) ◽  
pp. 5859-5862 ◽  
Author(s):  
Keiya Aoyagi ◽  
Yu Ohmori ◽  
Koya Inomata ◽  
Kazuhiro Matsumoto ◽  
Shigeru Shimada ◽  
...  
Keyword(s):  
Lewis Base ◽  
Base Catalyst ◽  
Hexamethylphosphoric Triamide

Hydrosilanes were synthesized by reduction of alkoxysilanes with BH3 in the presence of hexamethylphosphoric triamide (HMPA) as a Lewis-base catalyst. The reaction was also achieved using an inexpensive and easy-to-handle handled hydride source NaBH4, which reacted with EtBr as a sacrificial reagent to form BH3in situ.

Dual Iminium- and Lewis Base Catalyzed Morita–Baylis–Hillman Reaction on Cyclopent-2-enone

Synlett ◽  
2017 ◽  
Vol 29 (06) ◽  
pp. 820-824 ◽  
Author(s):  
Andrea Trabocchi ◽  
Riccardo Innocenti ◽  
Gloria Menchi
Keyword(s):  
Experimental Evidence ◽  
Lewis Base ◽  
Secondary Amines ◽  
Nucleophilic Attack ◽  
Allylic Alcohols ◽  
Base Catalyst ◽  
Co Catalysts

The application of iminium catalysis to the challenging Morita–Baylis–Hillman reaction on cyclopenten-2-one leads to the corresponding allylic alcohols in excellent yields. Experimental evidence shows that secondary amines act as co-catalysts activating the enone moiety towards the nucleophilic attack at the β-position by DABCO as the Lewis base catalyst, resulting in an augmented nucleophilic character towards the reaction with aldehydes.

Visible Light-Driven Biginelli Reaction over Mesoporous g-C3 N4 Lewis-Base Catalyst

2018 ◽  
Vol 3 (14) ◽  
pp. 4009-4014 ◽  
Author(s):  
Vidyasagar Devthade ◽  
Gopichand Kamble ◽  
Sachin G Ghugal ◽  
Kishor H. Chikhalia ◽  
Suresh S Umare
Keyword(s):  
Visible Light ◽  
Biginelli Reaction ◽  
Lewis Base ◽  
Base Catalyst ◽  
Visible Light Driven

A Polymer-Supported Phosphoramide as a Lewis-Base Catalyst for the Catalytic Aldol Reaction.

ChemInform ◽  
2004 ◽  
Vol 35 (44) ◽  
Author(s):  
Robert A. II Flowers ◽  
Xin Xu ◽  
Cody Timmons ◽  
Guigen Li
Keyword(s):  
Aldol Reaction ◽  
Lewis Base ◽  
Base Catalyst ◽  
Polymer Supported

A Simple Lewis Base Catalyst for the Asymmetric Steglich Rearrangement

Synfacts ◽  
2010 ◽  
Vol 2011 (01) ◽  
pp. 0098-0098
Author(s):  
W. Zhang ◽  
Z. Zhang ◽  
F. Xie ◽  
J. Jia
Keyword(s):  
Lewis Base ◽  
Base Catalyst

Aldol Reaction of Trimethylsilyl Enolate with Aldehyde Catalyzed by PyridineN-Oxide as a Lewis Base Catalyst

Synlett ◽  
2005 ◽  
pp. 2388-2390 ◽  
Author(s):  
Hisahiro Hagiwara ◽  
Hideyuki Inoguchi ◽  
Masakazu Fukushima ◽  
Takashi Hoshi ◽  
Toshio Suzuki
Keyword(s):  
Aldol Reaction ◽  
Lewis Base ◽  
Base Catalyst
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