作者:Gregory F. Miknis、Robert M. Williams
DOI:10.1021/ja00055a025
日期:1993.1
synthesized in a diastereoselective fashion from commercially available 5-chlororesorcinol in 13 steps. The synthesis involves an efficient stereoselective cycloaddition reaction of a hydroxamic ester to form the parent spiro[benzofuran-2(3H),2'-piperazine] ring system. In addition the synthesis employs a 2-nitrobenzyl group as an amide protecting group which is easily removed under photolytic conditions
(±)-Aspirochlorine 以非对映选择性方式从市售的 5-氯间苯二酚分 13 个步骤合成。该合成涉及异羟肟酯的有效立体选择性环加成反应,以形成母体螺[苯并呋喃-2(3H),2'-哌嗪]环系统。此外,合成使用 2-硝基苄基作为酰胺保护基团,在光解条件下很容易去除