N-Methoxy-1,2,4-Dioxazolidines by Ozonolysis Reactions
摘要:
Ozonolysis of ethyl vinyl ether (7a) in the presence of the O-methylated oxime of cyclohexanone (8) afforded N-methoxy-1,2-dioxa-4-azaspiro[4.5]decane (9a), and ozonolyses of the O-methylated dioximes of 1,4- and 1,5-dicarbonyl compounds (10a-e) afforded N-methoxylated bicyclic 1,2,4-dioxazolidines (12a-e).
The synthesis of new heterocyclic bridged ring systems. Analogs of tetrahydro-β-carbolines
作者:Christiaan Gremmen、Brigitte E.A. Burm、Martin J. Wanner、Gerrit-Jan Koomen
DOI:10.1016/s0040-4039(97)10823-1
日期:1998.3
New bridged β-carbolines were synthesized via a short synthetic route. The key step of the sequence is a Pictet-Spengler condensation under neutral conditions, employing a cyclic amine and several aldehydes. Using 5,5-diethoxypentanal gave a bridged analog which could be further ring closed to a new pentacyclic system.
Diastereoselective Synthesis of β-Amino Alcohols via Bu<sub>3</sub>SnH-Mediated Reductive Cyclization of Carbonyl−Oxime Ethers
作者:Jordi Tormo、David S. Hays、Gregory C. Fu
DOI:10.1021/jo971574y
日期:1998.1.1
<i>N</i>-Methoxy-1,2,4-Dioxazolidines by Ozonolysis Reactions
作者:Karl Griesbaum、Xuejun Liu、Henning Henke
DOI:10.1021/jo971469o
日期:1998.2.1
Ozonolysis of ethyl vinyl ether (7a) in the presence of the O-methylated oxime of cyclohexanone (8) afforded N-methoxy-1,2-dioxa-4-azaspiro[4.5]decane (9a), and ozonolyses of the O-methylated dioximes of 1,4- and 1,5-dicarbonyl compounds (10a-e) afforded N-methoxylated bicyclic 1,2,4-dioxazolidines (12a-e).