Browsing by Subject "Vilsmeier–Haack reagent"

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Cyclization of functionalized ketene-N,S-acetals to substituted pyrroles: applications in the synthesis of marine pyrrole alkaloids

Mathew, Paulson; Asokan, CV (Elsevier, 2005-01-17)

α-Oxoketene-N,S-acetals, prepared by the reaction of alkyl glycinates with β oxodithiocarboxylates followed by alkylation, underwent cyclization in the presence of the Vilsmeier reagent to afford alkyl 3-aryl-4-formyl-5- ...
An efficient synthesis of highly substituted pyrroles from β-oxodithiocarboxylates

Mathew, Paulson; Asokan, CV (Elsevier, 2006-02-20)

α-Oxoketene-N,S-acetals, prepared by the reaction of alkyl glycinate hydrochlorides with β-oxodithiocarboxylates followed by alkylation, underwent cyclization in presence of chloromethyleneiminium salt derived from POCl3/DMF ...

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