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. 2022 Jul 22;12:12550. doi: 10.1038/s41598-022-16959-w

Table 3.

Synthesis of indenylidene-1H-spiro[imidazo[1,2-a]pyridine-7,1′-indene (6a–d).

Entry Diamine Product Time (h) Yield (%)
1 graphic file with name 41598_2022_16959_Figp_HTML.gif graphic file with name 41598_2022_16959_Figq_HTML.gif 24 98
2 graphic file with name 41598_2022_16959_Figr_HTML.gif graphic file with name 41598_2022_16959_Figs_HTML.gif 28 98
3 graphic file with name 41598_2022_16959_Figt_HTML.gif graphic file with name 41598_2022_16959_Figu_HTML.gif 24 62
4 graphic file with name 41598_2022_16959_Figv_HTML.gif graphic file with name 41598_2022_16959_Figw_HTML.gif 32 82