Cadinane, Amorphane, Muurolane, Bulgarane, and related Tricyclic Sesquiterpenoids

6 Cadinane, Amorphane, Muurolane, Bulgarane, and related Tricyclic Sesquiterpenoids 

Levisalles and H. Rudler, Bull. Soc. chim. France, J964, 2020. 

Both (+)- -cadinene (71) and ( )-y2-cadinene (72) have been synthesised from the previously known intermediates (73, R = Et, optically active) and (73, R = Me, racemic). (— )-y2-Cadinene is one example of the relatively small 

The structure and stereochemistry of chiloscyphone (74) have been determined and o.r.d. and c.d. spectra are consistent with a non-steroidal conformation. From Taiwania cryptomerioides, three new muurolane-type sesquiterpenoids have been isolated viz., (75), (76), and (77). In accordance with the absolute 

Hayashi, A. Matsuo, and T. Matsuura, Tetrahedron Letters, 1969, 1599 A. Matsuo and S. Hayashi, ibid., 1970, 1289. 

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