Studies on taxadiene synthase: interception of the cyclization cascade at the verticillene stage and rearrangement to phomactatriene Academic Article

abstract

• The cyclization of geranylgeranyl diphosphate (GGDP) to taxadiene catalyzed by taxadiene synthase has been suggested to proceed in stages, involving a transient bicyclic verticillyl carbocation intermediate, which also has been proposed in the biosynthetic pathway leading to phomactatriene by marine fungi of Phoma sp. On incubation with des-7-methylGGDP, which would be expected to decrease the stability of a carbocation produced by hydride migration, taxadiene synthase produced phomactatrienes as major products. This indicates that the verticillyl carbocation was indeed formed but underwent further skeletal rearrangements, diverging from the usual pathway taken by GGDP en route to taxadiene. Products were identified using GC-MS, one- and two-dimensional NMR, and X-ray crystallography. 2007 Elsevier Ltd. All rights reserved.

authors

• Pennington, James

published proceedings

• TETRAHEDRON

author list (cited authors)

• Chow, S. Y., Williams, H. J., Pennington, J. D., Nanda, S., Reibenspies, J. H., & Scott, A. I.

citation count

• 23

complete list of authors

• Chow, Siew Yin||Williams, Howard J||Pennington, James D||Nanda, Samik||Reibenspies, Joseph H||Scott, A Ian

publication date

• January 2007

publisher

• Elsevier  Publisher

published in

• Tetrahedron: the international journal for the rapid publication of full original research papers and critical reviews in organic chemistr  Journal

Digital Object Identifier (DOI)

• 10.1016/j.tet.2007.03.029

start page

• 6204

end page

• 6209

volume

• 63

issue

• 27

URL

• http%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.tet.2007.03.029