Fluoride anion-induced intramolecular cyclopropanation of allylsilanes
作者:Airat M. Gimazetdinov、Aidar Z. Al'mukhametov、Leonid V. Spirikhin、Mansur S. Miftakhov
DOI:10.1016/j.tetlet.2017.07.023
日期:2017.8
The reaction of cyclopentenylsilane derivatives with n-Bu4NF in THF at rt was shown to proceed with the regio- and stereoselective formation of the corresponding bicyclo[3.1.0]hex-2-ene derivatives.
Some aspects of intramolecular carbocyclization of methyl (2E)-3-[(1S,2R,5R)-2-({[tert-butyl(dimethyl)-silyl]oxy}methyl)-5-(trimethylsilyl)cyclopent-3-en-1-yl]prop-2-enoate and its derivatives
作者:A. M. Gimazetdinov、A. Z. Al’mukhametov、L. V. Spirikhin、M. S. Miftakhov
DOI:10.1134/s1070428017060057
日期:2017.6
Treatment of methyl (2E)-3-[(1S,2R,5R)-2-([tert-butyl(dimethyl)silyl]oxy}methyl)-5-(trimethylsilyl) cyclopent-3-en-1-yl]prop-2-enoate with Bu4NF in THF resulted in intramolecular cyclization with formation of bicyclo[3.1.0]hexene structure. Possible ways of cyclopropane ring closure were discussed. Methyl (2E)-3-[(1R,4R,5S)-5-formyl-4-(trimethylsilyl)cyclopent-2-en-1-yl]prop-2-enoate failed to undergo
(+)-Multifidence ((+)-1) has been synthesized starting from (R)-(cyclopent-2-enyl)methanol ((+)-2) via its chloroformate 4, Co-mediated radical cyclization reaction to the lactone (+)-6, and introduction of the olefinic side chains.