Enantioselective Copper-Catalyzed Reductive Coupling of Vinylazaarenes with N-Boc Aldimines
摘要:
The diastereo- and enantioselective reductive coupling of vinylazaarenes with N-Boc aldimines is described, The reactions proceed using chiral copper-bisphosphine complexes in the presence of TMOS as a hydride source to give reductive coupling products in moderate to high enantioselectivities.
<i>N</i>-Carbamate Protected α-Amidoalkyl-<i>p</i>-tolylsulfones: Convenient Substrates in the aza-Morita−Baylis−Hillman Reaction
作者:Anna Gajda、Tadeusz Gajda
DOI:10.1021/jo801616d
日期:2008.11.7
An efficient and practical one-pot approach to aza-Morita-Baylis-Hillman adducts has been developed. The reaction occurs between N-Boc or N-Cbz imines, generated in situ from stable and easy to handle N-Boc or N-Cbz protected alpha-amidoalkyl-p-tolysulfones, and electron-deficient alkenes in the presence of DABCO. The presented procedure eliminates the use of the relatively unstable N-carbamate imines prior to the coupling reaction. The reaction is limited to alpha-amidosulfones derived from aromatic and heteroaromatic aldehydes.