Gold Catalysis: β-Ketonaphthalenes<i>via</i>Molecular Gymnastics of 1,6-Diyne-4-en-3-ols
作者:Tobias Lauterbach、Sebastian Arndt、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/adsc.201300396
日期:2013.6.17
1,6‐Diyne‐4‐en‐3‐ols with one terminal alkyne were applied as test substrates for a possible dual catalyzed cyclization. Instead of a dual catalysis cycle, naphthyl ketone derivatives were obtained as single products. The regioselectivity of the obtained products is unprecedented. Instead of the expected naphthyl ketones bearing the keto group in the α‐position, the keto group is positioned in the
On the synthesis of isoannulated pyrroles and δ-pyridones
作者:Wolfgang Eberbach、Norbert Laber
DOI:10.1016/s0040-4039(00)77673-8
日期:1992.1
The synthesis of furo- and thieno[2,3-c]pyridones 13a,b as well as the corresponding pyrroles 14a,b by using the 1,7-dipolar cyclization route of conjugated nitrones 9a,b is reported. In the presence of O2 and light the pyridones are converted into the pyridinediones 17a,b.
Carbene Transfer - A New Pathway for Propargylic Esters in Gold Catalysis
作者:Tobias Lauterbach、Sabrina Gatzweiler、Pascal Nösel、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/adsc.201300572
日期:2013.9.16
Gold carbenes generated via 1,2‐migration of a propargylic ester group can be transferred over a tethered alkyne. The use of aromatic backbones leads after a 1,7‐carbene transfer to a benzyl‐stabilized carbene as intermediate. A 1,2‐shift of a methyl group delivers vinyl‐substituted β‐naphthol derivatives as the final products.