First synthesis of pyrrolothiadiazinones. An alternative core ring for xanthine based structures
摘要:
The first synthesis of pyrrolothiadiazine core ring bearing substituents at positions 1, 3 and 6 is described, using a straightforward synthesis from diversely substituted 5-methylthiadiazines. These structures are of interest not only because they can be considered as useful building blocks but also because they can potentially be used as alternative core rings for biologically important molecules bearing xanthine as a central core. (c) 2006 Elsevier Ltd. All rights reserved.
3,3′-bi(6,8-dialkyl-2,4-dioxa-7-thia-6,8-diazabicyclo[3.3.0]-octane-7,7-dioxides): Structure and synthesis
作者:G. A. Gazieva、Yu. V. Nelyubina、A. N. Kravchenko、K. A. Lysenko、N. G. Kolotyrkina、P. A. Belyakov、A. A. Korlyukov、O. V. Lebedev、N. N. Makhova
DOI:10.1134/s107042800902016x
日期:2009.2
Derivatives of a new heterocyclic system, 3,3′-bi(6,8-dialkyl-2,4-dioxa-7-thia-6,8-diazabicyclo[3.3.0]-octane-7,7-dioxides), were synthesized by condensation of 1,3-dialkylsulfamides with glyoxal (as a dihydrate trimer). Their structure was investigated by spectral methods, XRD, and X-ray phase analysis of one among these compounds.
Glycolurils in α-ureido-and α-aminoalkylation reactions 1. α-Ureidoalkylation of sulfamides with N-(hydroxymethyl)glycolurils
作者:G. A. Gazieva、A. N. Kravchenko、N. S. Trunova、N. N. Makhova
DOI:10.1007/s11172-007-0358-8
日期:2007.11
α-Ureidoalkylation of sulfamides with 2-hydroxymethyl-, 2,6-and 2,8-bis(hydroxymethyl)-, and 2,4,6,8-tetrakis(hydroxymethyl)glycolurils gave novel bi-, tri-, and tetracyclic fused systems combining the glycoluril and sulfamide fragments.
I2–Py–SO2 system. Various amines in the absence of acids in this system gave N,N′-disubstituted diaminosulfone derivatives in good yields. Benzoic acid itself in the absence of amines gave benzoic acid anhydride in this system slowly.