4-ALKENYL-2-AZETIDINONE DERIVATIVES, PROCESS FOR PREPARING 4-ALKENYL-2-AZETIDINONE DERIVATIVES AND MULTICYCLIC COMPOUNDS PREPARED USING 4-ALKENYL-2-AZETIDINONE DERIVATIVES
申请人:Lee Phil Ho
公开号:US20080154034A1
公开(公告)日:2008-06-26
The present invention relates to 4-alkenyl-2-azetidinone derivatives represented by the following chemical formula 1, a process for preparing the 4-alkenyl-2-azetidinone derivatives, and multicyclic compounds prepared using the 4-alkenyl-2-azetidinone derivatives
wherein, Q, R
1
and R
2
are respectively the same as defined in the detailed description of the present invention.
Indium-Mediated Selective Introduction of a 1,3-Butadien-2-yl Group at the C4-Position in 2-Azetidinones and Application of 1,3-Diene-Tethered 2-Azetidinones in the Diels–Alder Reaction
作者:Kooyeon Lee、Phil Ho Lee
DOI:10.1002/chem.200700796
日期:2007.10.26
The reaction of 4-acetoxy-2-azetidinones with organoindium reagents generated in situ from indium and 1,4-dibromo-2-butyne in the presence of LiCl in DMF selectively produced 2-azetidinones which contain a 1,3-butadienyl-2-yl group at the C4-position in good yields. The Diels-Alderreaction of 4-[(1-methylene)prop-2-enyl]-2-azetidinones with a variety of dienophiles provided 2-azetidinones with valuable