Synthesis and ring-chain-ring tautomerism of bisoxazolidines, thiazolidinyloxazolidines, and spirothiazolidines.
Synthesis and ring-chain-ring tautomerism of bisoxazolidines, thiazolidinyloxazolidines, and spirothiazolidines.
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DOI:
10.1021/jo2008498
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发表时间:
2011-07-15
影响因子:
3.6
通讯作者:
Mahlerf, Graciela
中科院分区:
文献类型:
--
作者:
Saiz, Cecilia;Wipf, Peter;Mahlerf, Graciela
The synthesis of fused heterocycles such as thiazolidinyl-oxazolidine 3 is described starting from Tris.HCl. The mercaptomethyl bisoxazolidine 8 was found to convert to the corresponding thiazolidinyloxazolidine 3 and the spiro-heterocycle 4 by a ring-chain-ring tautomerism, depending on the electronic nature of the ring substituents as well as the reaction conditions. This equilibration pathway is absent in the hydroxymethyl bisoxazolidines 2. Computational studies confirm that both kinetic and thermodynamic control features play a role in the product distribution.
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