Synthesis of a 2-Aminohexahydrobenzoxazole Analog Related to Trehazolin
摘要:
2-Aminohexahydrobenzoxazole analogue 1a, related to trehazolin (2) was synthesized using the Ferrier reaction as a key step. The structural elucidation of this compound by NMR analysis indicated that it is an inseparable mixture of three components (1a-c) which in turn stems from the propensity of 1a to partially undergo both transcyclization (1a --> 1b) of the aminooxazoline between the hydroxy group at the C-1 position of aminocyclitol in the aglycon moiety and the hydroxy group at the C-2 position of D-glucose moiety and successive transformation (1b --> 1c) of the D-glucose moiety from a pyranose to a furanose structure.
Synthesis of a 2-Aminohexahydrobenzoxazole Analog Related to Trehazolin
摘要:
2-Aminohexahydrobenzoxazole analogue 1a, related to trehazolin (2) was synthesized using the Ferrier reaction as a key step. The structural elucidation of this compound by NMR analysis indicated that it is an inseparable mixture of three components (1a-c) which in turn stems from the propensity of 1a to partially undergo both transcyclization (1a --> 1b) of the aminooxazoline between the hydroxy group at the C-1 position of aminocyclitol in the aglycon moiety and the hydroxy group at the C-2 position of D-glucose moiety and successive transformation (1b --> 1c) of the D-glucose moiety from a pyranose to a furanose structure.