Practical Ruthenium-Catalyzed Cyclocarbonylation of Allenyl Alcohols in 2,4,6-Collidine Leading to α,β-Unsaturated Lactones: Concise Stereoselective Synthesis of (+)-Isomintlactone
摘要:
We have found that ruthenium-catalyzed cyclocarbonylation of allenyl alcohols in 2,4,6-collidine under atmospheric pressure of carbon monoxide smoothly proceeds to afford alpha,beta-unsaturated five- and six-membered lactones in moderate to good yields. Furthermore, we have completed a highly stereoselective synthesis of (+)-isomintlactone by the cyclocarbonylation of allenyl alcohol using 2,4,6-collidine.
Prop-2-ynyl- and propadienyl-lithium reagents. Regiocontrolled synthesis of allenic compounds
作者:Chanh Huynh、G�rard Linstrumelle
DOI:10.1039/c39830001133
日期:——
Direct proof for the rearrangement of the prop-2-ynyl-lithium (2) into the propadienyl-lithium (4) is provided by the formation of the 1,3-disubstituted alleniccompounds(7).
Practical Ruthenium-Catalyzed Cyclocarbonylation of Allenyl Alcohols in 2,4,6-Collidine Leading to α,β-Unsaturated Lactones: Concise Stereoselective Synthesis of (+)-Isomintlactone
We have found that ruthenium-catalyzed cyclocarbonylation of allenyl alcohols in 2,4,6-collidine under atmospheric pressure of carbon monoxide smoothly proceeds to afford alpha,beta-unsaturated five- and six-membered lactones in moderate to good yields. Furthermore, we have completed a highly stereoselective synthesis of (+)-isomintlactone by the cyclocarbonylation of allenyl alcohol using 2,4,6-collidine.
HUYNK, CHANH;LINSTRUMELLE, G., J. CHEM. SOC. CHEM. COMMUN., 1983, N 20, 1133-1134