Rearranged abietane diterpene

Topcu, G. Ulubelen, A. Abietane and rearranged abietane diterpenes from Salvia montbretii. J. Nat. Prod. 1996, 59, 734—737. 

Top9u, G., Eris, C., Ulubelen, A. 1996. Rearranged abietane diterpenes from salvia limbata. Phytochemistry 41 1143-1147. 

Salvia candidissima Vahl. subsp. occidentalis yielded six rearranged abietane diterpenes, three of them being new. The known compounds were 1-oxoaethiopinone, salvipisone, microst ol and the new compounds, 1-oxosalvipisone (39), 3-oxosalvipisone (40) and candidissiol (41). The structures of... 

Six new rearranged abietane diterpenes were isolated from S. limbata C.A. Meyer . These compounds werel2-hydroxysapriparaquinone (44), 3,12-hydroxysapriparaquinone (45), 2-hydroxy-saprorthoquinone (46), limbinol (47), salvilimbinol (48) and dehydrosalvilimbinol (49). The structures of... 

The eo-clerodane diterpenoids were isolated from the aerial parts of Teucrium species, however, from the roots rearranged abietane diterpenes were obtained. The first study with the roots of T. polium subsp. vincentinum was carried out by the Spanish-Italian group [71]. In this study four new compounds teuvincenones A, B, C and D (122-125) have been isolated. Two of them, teuvincenones C (124) and D (125) possess a novel hydrocarbon skeleton which contains a cyclopropane ring constituted by C-3, C-4 and C-18 carbons of the 17(15-16)-a6eo-abietane framework. 

Makinoa crispata (Steph.) Miyake from Japan was shown by Hashimoto et al. (1989) to contain diterpene derivatives of the sort illustrated as [466-469] (see Fig. 5.7 for stractures). More recently, Liu and Wu (1997) reported the presence of the rearranged abietane-type diterpenoid derivative makanin [470] from plant material of M. crispata collected on Taiwan. Of note was the apparent absence of any of these compounds in the Japanese plants. 

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