Direct Mechanism of the First Carbon-Carbon Bond Formation in the Methanol-to-Hydrocarbons Process In the past two decades, the reaction mechanism of C−C bond formation from either methanol or dimethyl ether (DME) in the methanol-to-hydrocarbons (MTH)... X Wu,S Xu,W Zhang,... - 《An...
A reaction between steroidal sapogenins and hydrogen sulfide promoted by BF3·Et2O is described. The thiodiosgenin and thiotigogenin comprising a sulfur atom on the F ring can be easily afforded in one step under this mild reaction condition. Furthermore, a hypothetical mechanism is also shown....
The BF3.Et2O-catalyzed reaction of 1,2-bis[(trimethylsilyl)oxy]cyclobutene and analogues... Examines the reactions between the cyclobutene and analogues with the presence of the aromatic ketones. How the geminal acylations were employed; Circumst......
BF3·Et2O promoted metal-free denitrogenative transannulation of N-sulfonyl-1,2,3-triazole was reported. Rather than transition metals, BF3·Et2O was employed for the first time to promote the formation of α-diazoimines from N-sulfonyl-1,2,3-triazoles in nitriles, leading to the synthesis...
Fluorination using chiral catalytic methods could result in a direct access to asymmetric fluorine chemistry. However, challenges in catalytic asymmetric fluorinations, especially the longstanding stereochemical challenges existed in BF3·Et2O-based fluo
The rearrangement of the C20,C22-epoxide(3a)catalyzed by BF3·Et2O was investigated.The structures of 10 products obtained in this reaction(1a,1b,10,11,12 or 13,14,15,16,17 and 18)were determined and the mechanism discussed.LIU Xing-Ping PAN Xin-Fu LI Yu-Lin Institute of Organic ...
The rearrangement of the C20, C22-epoxide (3a) catalyzed by BF3· Et2O was investigated. The structures of 10 products obtained in this reaction (1a, 1b, 10, 11, 12 or 13, 14, 15, 16, 17 and 18) were determined and the mechanism discussed....
A systematic study of the conditions of experimentation was resulted to propose a possible mechanism of the progress of the reaction.M. SubramanyamKoya Prabhakara RaoDr. Ravi VaralaM. V. Rao
The reaction was performed by using a combined catalyst consisting of Cu(MeCN)4BF4and BF3·Et2O as additive in dichloromethane at 40 °C. A possible mechanism for the reaction has been proposed to explain the origin of the activation and the asymmetric induction. This method provides a ...
A reaction between steroidal sapogenins and hydrogen sulfide promoted by BF3·Et2O is described. The thiodiosgenin and thiotigogenin comprising a sulfur atom on the F ring can be easily afforded in one step under this mild reaction condition. Furthermore, a hypothetical mechanism is also shown....