A SYNTHETIC ROUTE TO ECHINOPINES A AND B

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Presentation transcript:

A SYNTHETIC ROUTE TO ECHINOPINES A AND B By: Alain Grandbois Jolaine Savoie Brice Stenne Julie Coté Yassir El-Azizi

OUR RETROSYNTHETIC APPROACH

PREPARATION OF THE PRECURSOR FOR KEY STEP 1

FIRST KEY STEP Kobayashi, T.; Koga, Y.; Narasaka, K. J. Org. Chem, 2001, 624, 73.

SECOND KEY STEP 93: 7 Tzvetkov, T. N.; Stammler, H.-G., Mattay, J. Eur. J. Org. Chem. 2006,351.

THIRD KEY STEP 3d

SOME COOKING - PART 1 Mikaye, H.; Nakao, Y.; Sasaki, M. Chem. Lett. 2007, 36, 104-105.

FOURTH KEY STEP Paquette, L. A.; Schaefer, A.G.; Springer, J.P. Tetrahedron, 1987, 43, 5567.

SOME COOKING – PART 2 Srikrishna, A.; Krishnan, K. Tetrahedron, 1992, 48, 3429.