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. 2022 Dec 7;12(54):34946–34950. doi: 10.1039/d2ra05704b

Scope of substituted chromonyl diene 3.

graphic file with name d2ra05704b-u1.jpg
Entry R1 R2 R3 R4 R5 Products Temp. Yield (%)
1 H H H H Q 3a, 3′a r.t. 72 (Z : E = 60 : 40)
2 H H H OMe Q 3b, 3′b r.t. 84 (Z : E = 60 : 40)
3 H OMe OMe H Q 3c, 3′c r.t. 78 (Z : E = 55 : 45)
4 Cl H H H Q 3d, 3′d 80 67 (Z : E = 60 : 40)
5 Cl Cl H H Q 3e, 3′e r.t. 63 (Z : E = 60 : 40)
6 H Cl H H CN 3f 80 75
7 Cl H H H CN 3g r.t. 78
8 Cl H H OMe CN 3h 80 81
9 Cl OMe OMe H CN 3i 80 62