87281-43-4Relevant articles and documents
X=Y-ZH Systems as Potential 1,3-Dipoles. Part 42. Decarboxylative Three Carbon Ring Expansion of Cyclic Secondary α-Amino Acids via Azomethine Ylide Formation.
Ardill, Harriet,Grigg, Ronald,Malone, John F.,Sridharan, Visuvanathar,Thomas, W. Anthony
, p. 5067 - 5082 (1994)
Cyclic 5- and 6-membered secondary α-amino acids react with formaldehyde and acetylenic dipolarophiles via azomethine ylide formation, cycloaddition and subsequent ring expansion to give 8- and 9-membered rings respectively.Ring expansion occurs by reaction of the bridgehead nitrogen of the initial bicyclic cycloadduct with a further molecule of dipolarophile to give a zwitterion which triggers the ring expansion.Dynamic p.m.r. studies show that ring inversion between pairs of mirror image conformations of the medium ring products are occuring with inversion barriers of 13-14.6 kcal/mol.
HEPATITIS B CAPSID ASSEMBLY MODULATORS
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Paragraph 0358; 0360, (2019/12/30)
Described herein are hepatitis B capsid assembly modulators and pharmaceutical compositions comprising said compounds. The subject compounds and compositions are useful for the treatment of hepatitis B.
New indolizine compound, preparation method thereof and pharmaceutical compositions containing them (by machine translation)
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Paragraph 0106; 0107; 0108; 0109, (2016/10/09)
The invention of the formula (I) compound, Wherein R a, R b, R c, R d, T, R 3, R 4, R 5, X, Y and Het as defined in the description. The invention also relates to a medicament containing the above-mentioned compounds. (by machine translation)