Addition of Trimethylsilyl Enol Ethers to Isoquinolinium Salts: A Facile Synthesis of 1-(2-Oxoalkyl)-2-(ethoxycarbonyl)(or acetyl)- 1,2-dihydroisoquinolines and Their Cyclization for the Synthesis of the Isoquinoline Alkaloid Skeleton

Article abstract of DOI:10.1021/jo00201a013

The addition of trimethylsilyl enol ethers to 2-acylisoquinolinium salts afforded 1-(2-oxoalkyl)-2-(ethoxycarbonyl)(or acetyl)-1,2-dihydroisoquinolines (3) in excellent yields.These compounds were cyclized with bases to give benzoquinolizine derivative