Synthesis of (+/-)-8-Oxa-3-azabicyclo[3.2.1]octan-2-thione and (+/-)-2-Oxa-5-azabicyclo[2.2.1]heptan-6-thione: Potential Synthons for the Preparation of Novel Heteroaryl-Annulated Bicyclic Morpholines

[摘要]：The bridged bicyclic morpholinethiones (+/-)-8-oxa-3-azabicyclo[ 3.2.1]octane-2-thione and (+/-)-2-oxa-5-azabicyclo[2.2.1]heptane-6-thione have been prepared in five and eight steps, respectively. Both compounds were derived from a respective requisite cis-disubstituted tetrahydrofuran, which was stereoselectively prepared via hydrogenation of the corresponding disubstituted furan derivatives.

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