A straightforwardsynthesis of 1,2‐dicyanoalkanes by reacting nitroalkenes with trimethylsilyl cyanide in the presence of tetrabutylammoniumfluoride is described. The reaction proceeds through a tandem double Michael addition under mild conditions. Employing the hypervalent silicate generated from trimethylsilyl cyanide and tetrabutylammoniumfluoride is essential for achieving this transformation
Nano n-propylsulfonated γ-Fe2O3 (NPS-γ-Fe2O3) as a magnetically recyclable heterogeneous catalyst for the efficient synthesis of 2-indolyl-1-nitroalkanes and bis(indolyl)methanes
作者:Sara Sobhani、Roya Jahanshahi
DOI:10.1039/c3nj40899j
日期:——
Nano n-propylsulfonated γ-Fe2O3 (NPS-γ-Fe2O3) was used as a new magnetically recyclable heterogeneous catalyst for the efficient synthesis of indole derivatives, such as 2-indolyl-1-nitroalkanes and bis(indolyl)methanes.
Mesoporous Pd‐MCM‐41 catalyzed expeditious synthesis of 1,3,5‐triarylbenzenes and 4‐aryl‐NH‐1,2,3‐triazoles have been developed via denitrative cyclo‐trimerization of β‐nitrostyrenes and de‐nitrative [3+2] cycloaddition of β‐nitrostyrenes with TMSN3 respectively. The catalyst was reused at least up to eight times with minimum loss of catalytic activity.
Synthesis of Bicyclic Isoxazoles and Isoxazolines via Intramolecular Nitrile Oxide Cycloaddition
作者:Wen-Chang Chen、Veerababurao Kavala、Yu-Hsuan Shih、Yu-Hsuan Wang、Chun-Wei Kuo、Tang-Hao Yang、Chia-Yu Huang、Hao-Hsiang Chiu、Ching-Fa Yao
DOI:10.3390/molecules200610910
日期:——
An efficient and straight forward procedure for the syntheses of bicyclic isoxazole/isoxazoline derivatives from the corresponding dimethyl-2-(2-nitro-1-aryl/alkyl)-2-(prop-2-yn-1yl)malonates or dimethyl 2-allyl-2-(2-nitro-1-aryl/alkyl ethyl)malonate is described. High yields and simple operations are important features of this methodology.
Baker’s yeast as an efficient biocatalyst for regioselective 1,4-conjugate addition of indoles to nitroolefins in aqueous medium
作者:Ananda Mane、Trushant Lohar、Rajashri Salunkhe
DOI:10.1016/j.tetlet.2016.04.057
日期:2016.6
The 1,4-conjugate addition of indoles to nitroolefins was efficiently carried out in aqueous media using baker’s yeast as a biocatalyst at room temperature. The merits of the present method are operational simplicity, easy workup, utilization of an inexpensive catalyst, free from hazardous organic solvents and good yields of products. The generality of this method was demonstrated by synthesizing an