One-pot synthesis of tetraalkyl benzene-1,2,3,5-tetracarboxylates from a four-component reaction of alkyl propiolates and alkyl 2-nitroethanoates promoted by Ph3P
Alkyl 2-nitroethanoates react with alkyl propiolates in the presence of triphenylphosphine (Ph3P) in a mechanistically unprecedented reaction to afford tetraalkyl benzene-1,2,3,5-tetracarboxylates in moderate yields (36-42%).
Transfer technology III: The synthesis of bridged cyclic polyenes using a new retrosynthetic algorithm as a guide
This route to bridged [4] and [8] annulenes employs a new retrosynthetic algorithm, transannular π-bond pairing, as its basis and improved transfer reagents for substituted cyclobutadienes to achieve the synthesis.
Warrener,Wang,Weerasuria,Russell
p. 7069 - 7072
(2007/10/02)
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