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乙硼烷(4)叠氮化物：意想不到的瞬时亚胺硼烷稳定来源。

Diborane(4) Azides: Surprisingly Stable Sources of Transient Iminoboranes.

作者信息

Thiess Torsten, Bélanger-Chabot Guillaume, Fantuzzi Felipe, Michel Maximilian, Ernst Moritz, Engels Bernd, Braunschweig Holger

机构信息

Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.

Département de Chimie, Université Laval, 1045 Avenue de la Médecine, Québec, G1V 0A6, Canada.

出版信息

Angew Chem Int Ed Engl. 2020 Sep 1;59(36):15480-15486. doi: 10.1002/anie.202003050. Epub 2020 May 28.

DOI:10.1002/anie.202003050
PMID:32270577
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7497274/
Abstract

Herein we describe the first examples of isolable electron-precise diboranes(4) that bear azide moieties: the acyclic 1,2-diazido-1,2-bis(dimethylamino)diborane(4) and the cyclic 1,4-diaryl-2,3-diazido-1,4-diaza-2,3-diborinines (aryl=mesityl, 2,6-xylyl, 4-tolyl). The reported examples are not only stable enough to be observed and isolated (putative transient diborane(4) azides previously reported by our group spontaneously decompose even below room temperature), but some of them are even robust enough to undergo controlled pyrolysis without explosive decomposition at temperatures well above 100 °C. In two cases, the controlled pyrolysis allows the isolation of complex diazaboretidines, which are the apparent dimerization products of endocyclic boryl-iminoboranes.

摘要

在此，我们描述了首批带有叠氮基部分的可分离的电子精确硼烷（4）：无环的1,2 - 二叠氮基 - 1,2 - 双（二甲基氨基）硼烷（4）和环状的1,4 - 二芳基 - 2,3 - 二叠氮基 - 1,4 - 二氮杂 - 2,3 - 二硼杂环戊二烯（芳基 = 均三甲苯基、2,6 - 二甲苯基、对甲苯基）。所报道的这些实例不仅稳定到足以被观察和分离（我们小组先前报道的推测的瞬态硼烷（4）叠氮化物甚至在室温以下就会自发分解），而且其中一些甚至足够稳定，能够在远高于100°C的温度下进行可控热解而不发生爆炸分解。在两个实例中，可控热解使得能够分离出复杂的二氮杂硼杂环丁烷，它们是环内硼基 - 亚氨基硼烷的明显二聚产物。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d381/7497274/8b3a1497d336/ANIE-59-15480-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d381/7497274/ddc47d12b142/ANIE-59-15480-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d381/7497274/9abf42cb4a6b/ANIE-59-15480-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d381/7497274/147c11b0acae/ANIE-59-15480-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d381/7497274/784371be1888/ANIE-59-15480-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d381/7497274/2882e81b7303/ANIE-59-15480-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d381/7497274/8b3a1497d336/ANIE-59-15480-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d381/7497274/ddc47d12b142/ANIE-59-15480-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d381/7497274/9abf42cb4a6b/ANIE-59-15480-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d381/7497274/147c11b0acae/ANIE-59-15480-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d381/7497274/784371be1888/ANIE-59-15480-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d381/7497274/2882e81b7303/ANIE-59-15480-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d381/7497274/8b3a1497d336/ANIE-59-15480-g006.jpg

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