Synthetic approaches to neorogiolanes: enantiospecific synthesis of 12-methoxyneorogiola-1,3,5,7(17),8-pentaene
摘要:
Enantio specific synthesis of 12-methoxyneorogiola-1,3,5,7(17),8-pentaene, containing the complete carbon framework of the natural diquinane diterpenes neorogioldiols, starting from (S)-campholenaldehyde is described. (c) 2007 Elsevier Ltd. All rights reserved.
Enantiospecific total synthesis of 15-hydroxy-5-(methoxymethoxy)crinipellin-9-one
摘要:
Enantiospecific total synthesis of the crinipellin mentioned in the title was accomplished. In the present synthesis cyclopentane ring in campholenaldehyde was identified as the B-ring, two intramolecular rhodium carbenoid CH insertion reactions were employed for the construction of the A and C rings, and an intramolecular Michael addition reaction was utilized for the construction of the D-ring of crinipellin. (C) 2012 Elsevier Ltd. All rights reserved.