Journal
TETRAHEDRON LETTERS
Volume 45, Issue 25, Pages 4851-4854Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2004.04.157
Keywords
benzodiazepine.; Pictet-Spengler
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A synthesis of 1,2,3,4,8,9,10,10a-octahydro-7bH-cyclopenta[b][1,4]diazepino[6,7,1-hi]indole is described exemplifying a new synthetic route to medicinally interesting compounds. The key step involves a cyclization of 2-(2,3,3a,8b-tetrahydrocyclopenta[b]indol-4(1H)-yl)-ethanamine with aqueous formaldehyde in the presence of trifluoroacetic acid. (C) 2004 Elsevier Ltd. All rights reserved.
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