N Alkylation of Tosylamides Using Esters as Primary and Tertiary Alkyl Sources: Mediated by Hydrosilanes Activated by a Ruthenium Catalyst
作者:Takashi Nishikata、Hideo Nagashima
DOI:10.1002/anie.201201426
日期:2012.5.29
Select your group: Either a primary or tertiaryalkyl group can be selectively introduced onto the nitrogen atom of tosylamides in a ruthenium‐catalyzed reaction employing hydrosilanes through a judicious choice in the esters that serve as the alkylsource (see scheme; Ts= 4‐toluenesulfonyl). These N‐alkylation reactions are useful for construction of naturally occurring azacyclic skeletons.
Regioselective Rhodium(I)-Catalyzed Hydroarylation of Protected Allylic Amines with Arylboronic Acids
作者:Gavin Chit Tsui、Frederic Menard、Mark Lautens
DOI:10.1021/ol100974f
日期:2010.6.4
A novel regioselective rhodium(I)-catalyzed hydroarylation of unactivated alkenes with arylboronicacids is described. The catalytic system employs [Rh(COD)OH]2 and BINAP to effect the addition of various arylboronicacids to protected allylic amines. The regioselectivity was found to be highly dependent on the protecting group, favoring the linear addition product with up to 92% yield and >20:1 regioselectivity