Catalytic asymmetric synthesis gram-scale syntheses

Kozmin SA, Iwama T, Huang Y, Rawal VH. An efficient approach to Aspidosperma alkaloids via [4-1-2] cycloadditions of aminosiloxydienes stereocontrolled total synthesis of ( )-tabersonine. Gram-scale catalytic asymmetric syntheses of (-l-)-tabersonine and (-l-)-16-methoxytahersonine. Asymmetric syntheses of (-l-)-aspidospermidine and (-)-quebrachamine. J. Am. Chem. Soc. 2002 124(17) 4628-4641. 

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