Centre for the Study of Invention and Social Process, que fue creciendo bastante y ahora se llama Centre for Invention and Social Process2. MT: ¿Cómo pusiste en práctica el concepto de "trabajo interdisciplinario"? and established the Centre for the Study of Invention and Social Process, which is now thriving as the Centre for Invention and Social Process.2 MT: How did you put the idea of 'interdisciplinary work' into practice?

Irradiation of dehydrolumisteryl acetate affords a stereoisomer of photodehydroergosteryl acetate. By comparison of a model diene-dione from artemisin with the diene-dione obtained earlier from photodehydroergosterol it has been shown that the photochemical transformation of dehydroergosterol proceeds with inversion of configuration a t the angular methyl group. A complete stereochemical representation of photodehydroergosterol is thus provided.The solvolysis rates of tetrahydrophotohydroergosterol toluene-psulphonate and related compounds have been measured and the vinylcyclopropane ring thus shown to participate strongly in the reaction.A preliminary account of this work has already been published.1THE conversion of dehydroergosteryl acetate (I) into its photo-isomer (11; R = Ac) was described in an earlier paper of this series.2 The stereochemistry of the product (11) is

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