The search for the ethynylcation: Nitrosation ofN,N-bis(trimethylsilyl)ynamines
作者:Roberto Mart�nez Alvarez、Michael Hanack、Thomas Schmid、L. R. Subramanian
DOI:10.1002/poc.610080310
日期:1995.3
The reaction of bis-silylated ynamines with different nitrosyl reagents affords products derived from an electrophilic attack at the β-carbon atom and not the expected alkynyldiazonium salts.
Batch and Flow Photochemical Benzannulations Based on the Reaction of Ynamides and Diazo Ketones. Application to the Synthesis of Polycyclic Aromatic and Heteroaromatic Compounds
作者:Thomas P. Willumstad、Olesya Haze、Xiao Yin Mak、Tin Yiu Lam、Yu-Pu Wang、Rick L. Danheiser
DOI:10.1021/jo402010b
日期:2013.11.15
compounds are produced via a two-stage tandem benzannulation/cyclization strategy. The initial benzannulation step proceeds via a pericyclic cascade mechanism triggered by thermal or photochemical Wolff rearrangement of a diazo ketone. The photochemical process can be performed using a continuous flow reactor which facilitates carrying out reactions on a large scale and minimizes the time required for
A simple three step procedure for the synthesis of N,N-bis(trimethylsilyl)ynamines is described. The substances are valuable syntheticequivalents for the preparatively inaccessible primary ynamines, as shown by a new synthesis of N-methyleneynamines from and aldehydes.