A four-step synthesis of the ardeemin framework by starting from N-2-aminobenzoyl-alpha-amino esters is described. In the last step, the acid promoted cyclization of the 1,4-anti-4-alkyl-1-(3-indolylmethyl)-2,4-dihydro-1H-pyrazino[2,1-h]quinazoline-3,6-diones occurs irreversible and stereocontrolled. (C) 2003 Elsevier Science Ltd. All rights reserved.
A four-step synthesis of the ardeemin framework by starting from N-2-aminobenzoyl-alpha-amino esters is described. In the last step, the acid promoted cyclization of the 1,4-anti-4-alkyl-1-(3-indolylmethyl)-2,4-dihydro-1H-pyrazino[2,1-h]quinazoline-3,6-diones occurs irreversible and stereocontrolled. (C) 2003 Elsevier Science Ltd. All rights reserved.
A four-step synthesis of the ardeemin framework by starting from N-2-aminobenzoyl-alpha-amino esters is described. In the last step, the acid promoted cyclization of the 1,4-anti-4-alkyl-1-(3-indolylmethyl)-2,4-dihydro-1H-pyrazino[2,1-h]quinazoline-3,6-diones occurs irreversible and stereocontrolled. (C) 2003 Elsevier Science Ltd. All rights reserved.