Enantioselective Synthesis of Cocaine C-1 Analogues using Sulfinimines (N-Sulfinyl Imines)
摘要:
The first examples of cocaine analogues having substituents (methyl, ethyl, n-propyl, n-pentyl, and phenyl) at the C-1 position of the cocaine tropane skeleton were prepared by heating sulfinimine-derived alpha,beta-unsaturated pyrrolidine nitrones. In the presence of the Lewis acid Al((OBu)-Bu-t)(3) the nitrones undergo an intramolecular [3 + 2] cycloaddition to give tricyclic isoxazolidines that were transformed in three steps to the cocaine analogues. In the absence of the Lewis acid, lactams were formed resulting from rearrangement of the nitrone to an oxaziridine. A novel Pd-and base-promoted rearrangement of methanesulfonate salts of isoxazolidine to bridge bicyclic[4.2.1]isoxazolidines was discovered.
Enantioselective Synthesis of Cocaine C-1 Analogues using Sulfinimines (N-Sulfinyl Imines)
摘要:
The first examples of cocaine analogues having substituents (methyl, ethyl, n-propyl, n-pentyl, and phenyl) at the C-1 position of the cocaine tropane skeleton were prepared by heating sulfinimine-derived alpha,beta-unsaturated pyrrolidine nitrones. In the presence of the Lewis acid Al((OBu)-Bu-t)(3) the nitrones undergo an intramolecular [3 + 2] cycloaddition to give tricyclic isoxazolidines that were transformed in three steps to the cocaine analogues. In the absence of the Lewis acid, lactams were formed resulting from rearrangement of the nitrone to an oxaziridine. A novel Pd-and base-promoted rearrangement of methanesulfonate salts of isoxazolidine to bridge bicyclic[4.2.1]isoxazolidines was discovered.
Asymmetric Total Synthesis of (<i>S</i>)-(+)-Cocaine and the First Synthesis of Cocaine C-1 Analogs from <i>N</i>-Sulfinyl β-Amino Ester Ketals
作者:Franklin A. Davis、Naresh Theddu、Ram Edupuganti
DOI:10.1021/ol1017118
日期:2010.9.17
Sulfinimine-derived α,β-unsaturated pyrrolidine nitrones, on heating with Al(O-t-Bu)3, undergo a highly stereoselective intramolecular [3 + 2] cycloaddition to give tricyclic isoxazolidines, which are transformed in three-steps to give C-1 substituted cocaine analogs.
Cocaine Analogs and Methods of Preparation and Uses Thereof
申请人:Davis Franklin A.
公开号:US20120329828A1
公开(公告)日:2012-12-27
The invention provides novel cocaine analogs. The invention also provides a method of preparing cocaine analogs with control over the substituents installed at the C-1, C-2, C-3, C-4 and N-8 positions of the tropane bicyclic scaffold. The invention further provides methods of providing anesthesia, blocking reuptake of a monoamine neurotransmitter, and treating depression, by administering to a subject in need of such treatment a pharmaceutical composition comprising a compound of the invention.
US8557842B2
申请人:——
公开号:US8557842B2
公开(公告)日:2013-10-15
Enantioselective Synthesis of Cocaine C-1 Analogues using Sulfinimines (<i>N</i>-Sulfinyl Imines)
作者:Franklin A. Davis、Narendra V. Gaddiraju、Naresh Theddu、Joshua R. Hummel、Sandeep K. Kondaveeti、Michael J. Zdilla
DOI:10.1021/jo202652f
日期:2012.3.2
The first examples of cocaine analogues having substituents (methyl, ethyl, n-propyl, n-pentyl, and phenyl) at the C-1 position of the cocaine tropane skeleton were prepared by heating sulfinimine-derived alpha,beta-unsaturated pyrrolidine nitrones. In the presence of the Lewis acid Al((OBu)-Bu-t)(3) the nitrones undergo an intramolecular [3 + 2] cycloaddition to give tricyclic isoxazolidines that were transformed in three steps to the cocaine analogues. In the absence of the Lewis acid, lactams were formed resulting from rearrangement of the nitrone to an oxaziridine. A novel Pd-and base-promoted rearrangement of methanesulfonate salts of isoxazolidine to bridge bicyclic[4.2.1]isoxazolidines was discovered.