A series of spiro-oxadiazoles were synthesized from 1,4：3,6-dianhydro-D-fructose and hydrazides via a stereoselective two-step reaction sequence. The structures of newly synthesized compounds were established by spec...A series of spiro-oxadiazoles were synthesized from 1,4：3,6-dianhydro-D-fructose and hydrazides via a stereoselective two-step reaction sequence. The structures of newly synthesized compounds were established by spectral analysis. The absolute configuration of compound 2a was further confirmed by single crystal X-ray analysis. All the synthesized compounds were screened for their in vitro antitumor activity, showing that these compounds have poor inhibitory activities against A549, MGC-803 tumor cells.展开更多
文摘A dianhydro sugar derivative, (C_13H)14O_6S), M_r=298. 3. Orthorhombic P2_12_12_1, a=6. 28(1), b=13. 467(4), c=15.751 (2) A, V=1319. 0(5)A￣3, μ( MoKα)=2. 56cm￣(-1), D_c=1. 50 g/cm￣3, Z=4, F(000)=624, final R=0. 041, R_w=0. 050 for 1488 observed reflections. The pyranose ring in the dianhydro sugar appears a half-chair conformation owing to the effect of 3, 4-oxirane ring.
基金We gratefully acknowledge financial support from the National Natural Science Foundation of China （No. 21372207）.
文摘A series of spiro-oxadiazoles were synthesized from 1,4：3,6-dianhydro-D-fructose and hydrazides via a stereoselective two-step reaction sequence. The structures of newly synthesized compounds were established by spectral analysis. The absolute configuration of compound 2a was further confirmed by single crystal X-ray analysis. All the synthesized compounds were screened for their in vitro antitumor activity, showing that these compounds have poor inhibitory activities against A549, MGC-803 tumor cells.
