Cycloaddition von Heterocumulenen an C?N-Bindungssysteme. 1. Mitteilung. Perhydro-s-triazindione und Perhydro-s-triazinyl-harnstoffe aus N,N,N?-trisubstituieten Formamidinen und Isocyanaten
作者:Karl Seckinger
DOI:10.1002/hlca.19730560221
日期:1973.1.31
The addition of methyl isocyanate to N,N-dimethyl-N′-arylformamidines 4d–4r leads to the perhydro-s-triazine-diones 5d–5o and to the s-triazinylureas 10a–10k. The mechanism of formation is discussed.
Unexpected thermal decomposition of the “Alder carbene” (iPr2N)2C
作者:Tim Schulz、Michael Leibold、Christian Färber、Martin Maurer、Timo Porsch、Max C. Holthausen、Ulrich Siemeling
DOI:10.1039/c2cc34208a
日期:——
The "Alder carbene" (iPr(2)N)(2)C undergoes a beta-fragmentation in solution already at room temperature, affording propene and N,N,N'-triisopropylformamidine. This stands in sharp contrast to the indefinite stability previously claimed for this iconic compound.