Reactivity of an <i>N</i>
,<i>N</i>
-Chelated Germylene Toward Substituted Alkynes, Alkenes, and Allenes
作者:Jiří Böserle、Roman Jambor、Milan Erben、Filip Horký、Petr Štěpnička、Aleš Růžička、Libor Dostál
DOI:10.1002/zaac.201800489
日期:2019.5.15
activation of both C≡C and C=O bonds producing bicyclic compound containing two five‐membered 1‐germa‐2‐oxacyclopent‐3‐ene rings sharing one C–C bond, 4,8‐diphenyl‐3,7‐dioxa‐2,6‐digermabicyclo[3.3.0]octa‐4,8‐diene (5). With N‐methylmaleimide containing an analogous C(O)CH=CHC(O) fragment, germylene 1 reacted under [2+2+2] cyclization involving the C=C double bond, producing 1,2‐digermacyclobutane 6
用含有羰基官能团的二茂铁基炔烃(FcC≡CC(O)R)处理N,N螯合的亚二甲基[[ i Pr)2 NB(N-2,6-Me 2 C 6 H 3)2 ] Ge(1),导致[2 + 2 + 2]环化和形成的相应ferrocenylated 3-FC-4-C(O)- [R -1,2- digermacyclobut-3 -烯2 - 4 [ [R =我(2),OET(3)和带有完整羰基取代基的NMe 2(4)]。相比之下,1和PhC(O)C≡CC(O)Ph导致C≡C和C = O键均被激活,产生包含两个共享一个C-的五元1-锗-2-氧杂环戊-3-烯环的双环化合物C键,4,8-二苯基-3,7-二氧杂-2-2,6-二杂双环[3.3.0]八-4,8-二烯(5)。在N-甲基马来酰亚胺含有类似的C(O)CH = CHC(O)片段的情况下,亚种1在[2 + 2 + 2]环化作用下反应,涉及C = C双键,生成1