Reactions of Rare-Earth Metal Based Lewis Pairs with Azides  

作　　者：Yifan Dong Kejian Chang Xin Xu 

机构地区：[1]Key Laboratory of Organic Synthesis of Jiangsu Province,College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou,Jiangsu 215123,China

出　　处：《Chinese Journal of Chemistry》2020年第6期559-564,共6页中国化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(21871204),1000-Youth Talents Plan,and PAPD.

摘　　要：The reactivity of homoleptic rare-earth metal aryloxide based Lewis pairs toward organic azide substrates has been investigated herein.Treatment of RE(OAr)3(RE=La,Sm,X and Sc,Ar=2,6-'Bu2-C6H3),PEt3 and Me3SiN3 in 2:1:1 molar ratio resulted in formation of separated ion pair complexes[Me3Si-PEt3]^+[(ArO)3RE-N=N=N-RE(OAr)3]^-under mild conditions.Replacement of phosphine with the nitrogen-containing Lewis base l,4-diazabicyclo[2.2.2]octane(DABCO)produced analogous rare-earth azide complexes with[Me3Si-DABCO]+counterions.In contrast,reaction of the La(OAr)3/PEt3 Lewis pair with 1-adamantyl azide(AdN3)afforded the typical frustrated Lewis pair-type 1,1-addition product.A tetrahydrofuran ring-opening reaction was also observed for the resulting rare-earth azide complex with the[Me3Si-PEt3]+cation,with cleavage of the C—0 bond by Si/P cooperation.

关 键 词：AZIDE RARE complexes 

分 类 号：O62[理学—有机化学]