An improved protocol for the Prins desymmetrisation of cyclohexa-1,4-dienes
摘要:
Improved conditions are reported for the Prins-pinacol rearrangement of cyclohexa-1,4-diene-derived acetals. The use of triflic acid gives particularly clean reaction, resulting in a mixture of regioisomers in an approximately 10:1 ratio. A tethered version of this reaction is also reported, giving a tricyclic compound with the same stereochernistry as the core of the cladiellin diterpenes. (c) 2008 Elsevier Ltd. All rights reserved.
An improved protocol for the Prins desymmetrisation of cyclohexa-1,4-dienes
摘要:
Improved conditions are reported for the Prins-pinacol rearrangement of cyclohexa-1,4-diene-derived acetals. The use of triflic acid gives particularly clean reaction, resulting in a mixture of regioisomers in an approximately 10:1 ratio. A tethered version of this reaction is also reported, giving a tricyclic compound with the same stereochernistry as the core of the cladiellin diterpenes. (c) 2008 Elsevier Ltd. All rights reserved.