Tandem insertion of allenyl carbenoids and aldehydes into zirconacycles: an unexpected cyclisation
作者:George J. Gordon、Richard J. Whitby
DOI:10.1039/a702732j
日期:——
Allenyl carbenoids (3-chloro-1-lithioalk-1-ynes) insert into
zirconacyclopentanes and zirconacyclopentenes to afford cyclic
η
3
-allenyl/prop-2-ynyl zirconocene complexes which give
allenyl, alkynyl or cyclised-alcohol products on addition of aldehydes
activated with boron trifluoride–diethyl ether.
烯基碳烯烃(3-氯-1-硫代烷基-1-炔)插入到锆环戊烷和锆环戊烯中,生成环状 η 3 - 烯基/丙-2-炔基锆烯烃络合物,在加入用三氟化硼-二乙基醚活化的醛后,可生成烯基、炔基或环状醇产品。
Synthesis of 1,1-Organodiboronates
via Rh(I)Cl-Catalyzed Sequential Regioselective Hydroboration
of 1-Alkynes
作者:Kohei Endo、Takanori Shibata、Munenao Hirokami
DOI:10.1055/s-0028-1088131
日期:——
A Rh(I)Cl-DPPB-complex-catalyzed sequential hydroboration of aryl alkynes and aliphatic alkynes was achieved. The reaction proceeded with almost perfect regioselectivity to afford 1,1-organodiboronate compounds in moderate to good yield.