Iridium complex-catalyzed [2+2+2] cycloaddition of alpha,omega-diynes withmonoalkynes: a new and efficient catalyst for cyclotrimerization of alkynes

Authors
Takeuchi, R Tanaka, S Nakaya, Y
Citation
R. Takeuchi et al., Iridium complex-catalyzed [2+2+2] cycloaddition of alpha,omega-diynes withmonoalkynes: a new and efficient catalyst for cyclotrimerization of alkynes, TETRAHEDR L, 42(16), 2001, pp. 2991-2994
Citations number
24
Categorie Soggetti
Chemistry & Analysis","Organic Chemistry/Polymer Science
Journal title
TETRAHEDRON LETTERS
ISSN journal
00404039 → ACNP
Volume
42
Issue
16
Year of publication
2001
Pages
2991 - 2994
Database
ISI
SICI code
0040-4039(20010416)42:16<2991:IC[COA>2.0.ZU;2-W
Abstract
[Ir(cod)Cl](2) combined with dppe was found to be a new and efficient catal yst for [2+2+2] cycloaddition. Dimethyl dipropargylmalonate reacted with 1- hexyne in the presence of a catalytic amount of [Ir(cod)C1](2) combined wit h dppe at room temperature in 20 min to give an indane derivative in 84% yi eld. Various functionalized monoalkynes can be used for this [2+2+2] cycloa ddition. (C) 2001 Elsevier Science Ltd. All rights reserved.