From bis(silylamino)tin dichlorides via di(1-alkynyl)-bis(silylamino)tin to new heterocycles by 1,1-organoboration
作者:Bernd Wrackmeyer、Andreas Pedall、Wolfgang Milius、Oleg L Tok、Yuri N Bubnov
DOI:10.1016/s0022-328x(02)01136-1
日期:2002.4
LiCCtBu as well as with 1b, since side reactions also led to the formation of 1-alkynyl-bis(silylamino)tin chlorides 5–7 and tri(1-alkynyl)(silylamino)tin compounds 8 and 9. 1,1-Ethylboration of compounds 2–4 led to stannoles 10, 11, and in the case of propynides, also to 1,4-stannabora-2,5-cyclohexadiene derivatives 12. The molecular structure of the stannole 11b (R1=SiMe3) was determined by X-ray analysis
二氯化双(甲硅烷基氨基)锡1 [X 2 SnCl 2,X = N(Me 3 Si)2(a),N(9-BBN)SiMe 3(b),N(t Bu)SiMe 3(c)和N(SiMe 2 CH 2)2(d)]由两当量的相应锂酰胺(Li - a - d)与四氯化锡SnCl 4反应制得,或由相应的bis的1:1反应制得SnCl 4与(氨基)亚锡。化合物1与锂炔化物LiCCR两个当量反应1,得到二(1-炔基) -双(甲硅烷基)锡化合物X 2的Sn(CCR 1)2,2(R 1 =箱),3(R 1 =吨丁基),和4(R 1 =森达3)。问题遇到,主要是用LiCC吨卜以及与1b中,由于副反应也导致的1-炔基-双形成(甲硅烷)氯化锡5 - 7和三(1 -炔基)(甲硅烷)锡化合物8和9。化合物的1,1- Ethylboration 2 - 4导致stannoles 10,11,和在propynides的情况下,也向1