Cyclization of protected N-acylhydroxyguanidine to 3-amino-1,2,4-oxadiazole
摘要:
The acid mediated cyclization of a protected N-acylhydroxyguanidine into the corresponding 3-amino1,2,4-oxadiazole and confirmation of its structure by single crystal X-ray crystallography is reported herein. The yield of the cyclization is comparable to literature reports utilizing alternative procedures. Importantly, these new conditions provide complementary chemoselectivity to current synthetic procedures which may be useful for the synthesis of 3-amino-1,2,4-oxadiazoles in general. (C) 2011 Elsevier Ltd. All rights reserved.
Cyclization of protected N-acylhydroxyguanidine to 3-amino-1,2,4-oxadiazole
摘要:
The acid mediated cyclization of a protected N-acylhydroxyguanidine into the corresponding 3-amino1,2,4-oxadiazole and confirmation of its structure by single crystal X-ray crystallography is reported herein. The yield of the cyclization is comparable to literature reports utilizing alternative procedures. Importantly, these new conditions provide complementary chemoselectivity to current synthetic procedures which may be useful for the synthesis of 3-amino-1,2,4-oxadiazoles in general. (C) 2011 Elsevier Ltd. All rights reserved.