Table 4 Reusability of HMTA-BAIL@MIL-101(Cr).

From: Synthesis of tetrazolo[1,5-a]pyrimidine-6-carbonitriles using HMTA-BAIL@MIL-101(Cr) as a superior heterogeneous catalyst

Entry

Cycle

Yield (%)a

1

Fresh

96

2

1st recycle

96

3

2nd recycle

95

4

3rd recycle

94

5

4th recycle

94

  1. Reaction conditions: 4-bromobenzaldehyde (1 mmol), 1H-tetrazole-5-amine (1 mmol), and 3-cyanoacetyl indole (1 mmol), HMTA-BAIL@MIL-101(Cr) (0.01 g), solvent-free, 100 °C, 15 min.
  2. aIsolated yield.
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