Enantioselective total synthesis and assignment of the absolute configuration of (+)-laurokamurene B
摘要:
The first enantioselective total synthesis of the rearranged aromatic sesquiterpene (+)-laurokamurene B, isolated from the Chinese red algae Laurencia okamurai Yamada, has been accomplished starting from (S)-campholenaldehyde, establishing the absolute configuration of laurokamurenes. (C) 2008 Elsevier Ltd. All rights reserved.
The 6 R configuration of (+)-cis-γ-irone [(+)-4] was established by chemical correlation with (—)-camphor. (+)-cis-γ-irone [(+)-4] was converted into (+)-cis-α-irone [(+)-1], (−)-trans-α-irone [(minus;;)-2], and (+)-β-irone [(+)-3], which therefore also have the 6 R configuration. The 2 S configurations of (+)-cis-α-irone [(+)-1] and (+)-trans-α-irone [(+)-2] were determined by comparison of their
The first enantioselective total synthesis of the rearranged aromatic sesquiterpene (+)-laurokamurene B, isolated from the Chinese red algae Laurencia okamurai Yamada, has been accomplished starting from (S)-campholenaldehyde, establishing the absolute configuration of laurokamurenes. (C) 2008 Elsevier Ltd. All rights reserved.