Efficient and Convenient Syntheses of (R)-(-)-Cryptone and (S)-(-)-4-Isopropenyl-2-cyclohexen-1-one

Michiharu Kato; Masataka Watanabe; Youichi Tooyama; Bernhart Vogler; Akira Yoshikoshi

doi:10.1055/s-1992-26297

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Synthesis 1992; 1992(11): 1055-1057
DOI: 10.1055/s-1992-26297

short paper

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Efficient and Convenient Syntheses of (R)-(-)-Cryptone and (S)-(-)-4-Isopropenyl-2-cyclohexen-1-one

Michiharu Kato^* , Masataka Watanabe, Youichi Tooyama, Bernhart Vogler, Akira Yoshikoshi

^*Institute for Chemical Reaction Science, Tohoku University, Katahira, Aoba-Ku, Sendai 980, Japan

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Publication Date:
17 September 2002 (online)

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Starting with (+)-nopinone (3); (R)-(-)-Cryptone (1) and (S)-(-)-4-isopropenyl-2-cyclohexen-1-one (2) were synthesized in five steps and 42% overall yield, and four steps and 49% overall yield, respectively.