Issue 35, 2020

Diastereodivergent synthesis of dispiroheterocyclic structures comprising pyrrolidinyloxindole and imidazothiazolotriazine moieties

Abstract

Highly diastereoselective methods for the synthesis of two different diastereomers of polynuclear dispiroheterocyclic compounds with five chiral centers comprising pyrrolidinyloxindole and imidazothiazolotriazine moieties (dispiro[imidazo[4,5-e]thiazolo[2,3-c]-1,2,4-triazine-7,3′-pyrrolidine-2′,3′′-indoles]) have been developed on the basis of a dipolar cycloaddition of azomethine ylides to benzylidene derivatives of imidazothiazolotriazines and an alkali-induced rearrangement of the thiazolotriazine fragment. The different sequence of the cycloaddition and rearrangement stages allows us to perform the targeted synthesis of two diastereomerically pure products from the same starting compounds.

Graphical abstract: Diastereodivergent synthesis of dispiroheterocyclic structures comprising pyrrolidinyloxindole and imidazothiazolotriazine moieties

Supplementary files

Article information

Article type
Paper
Submitted
06 Aug 2020
Accepted
10 Aug 2020
First published
24 Aug 2020

Org. Biomol. Chem., 2020,18, 6905-6911

Diastereodivergent synthesis of dispiroheterocyclic structures comprising pyrrolidinyloxindole and imidazothiazolotriazine moieties

A. N. Izmest'ev, G. A. Gazieva, V. A. Karnoukhova and A. N. Kravchenko, Org. Biomol. Chem., 2020, 18, 6905 DOI: 10.1039/D0OB01628D

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