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. 2021 Oct 25;6(44):29483–29494. doi: 10.1021/acsomega.1c03469

Table 3. Cyclization Reaction Conditions for 1j.

graphic file with name ao1c03469_0009.jpg

entry solvent T (°C) t (h) 2j (%)
1a CH2Cl2 rt 24 8b
2c mesitylene/HOAc 4:1 rt 96 37
3c mesitylene/HOAc 4:1 40 24 33
4c mesitylene rt 96 -d
5c mesitylene 70 24 49
a

5 mol% of catalyst.

b

Conversion: 17%.

c

10 mol% of catalyst.

d

No p-TsOH was added; no reaction.