Synthetic explorations in the saframycin-ecteinascidin series: construction of major chiral subunits through catalytic asymmetric induction
摘要:
The major subunits needed to reach the titled targets have been assembled by chemistry, which included p-Claisen rearrangement, asymmetric epoxidation and asymmetric dihydroxylation. (C) 2000 Elsevier Science Ltd. All rights reserved.
Studies Directed to the Total Synthesis of ET 743 and Analogues Thereof: An Expeditious Route to the ABFGH Subunit
摘要:
[GRAPHICS]In model studies directed to the total synthesis of Et743, a strategic S-C bond formation in systems 26 and 27 was demonstrated. It was further shown that Pictet-Spengler cyclization leading to spiro product 33 exhibits very high stereoselection.