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. 2021 May 25;11(31):18768–18775. doi: 10.1039/d1ra02616j

Yields of compound 4a–i depending on the substituent (Ar) in the starting aldehydes.

Compounds Substituent Ar Yield 4a, % Compounds Substituent Ar Yield 4a, %
4a 4-F-C6H4 67 4f 3,4-(CH3O)2–C6H3 53
4b 4-Cl-C6H4 61 4g 4-CH3-C6H4 63
4c 3-F-C6H4 58 4h 4-(CH3)2N–C6H4 44
4d 4-CF3-C6H4 68 4i 1,3-Benzodioxol-5-yl 73
4e 4-(CH3O)–C6H4 59
a

The given yields for compounds 4a–i were obtained by method B.