Table 3. Optimization of heterogeneous DA reaction conditions between Iso and MVK ^a .

	Catalyst	mol% [Fe]/[MVK]	[Iso]/[MVK]	% Yield (1,4 : 1,5) b
1	[TEA]3[In3(BTC)4] c	0	4	0
2	[(Fp–L)0.6(TEA)2.4][In3(BTC)4]	10	1	26 (91 : 9)
3	[(Fp–L)0.6(TEA)2.4][In3(BTC)4]	10	2	40 (92 : 8)
4	[(Fp–L)0.6(TEA)2.4][In3(BTC)4]	10	4	45 (91 : 9)
5	[(Fp–L)0.6(TEA)2.4][In3(BTC)4]	5	4	21 (93 : 7)
7	[Fp–THF][BF4] d	10	4	67 (97 : 3)
8	[Fp–THF][BF4] d	1	4	24 (98 : 2)

^a[MVK] = 0.1 M, solvent = CH₂Cl₂, 25 °C, t = 96 h.

^bYield and regioselectivity (in parenthesis) were determined by GC. The major product, 1-methyl-4-acetyl-cyclohexene (1,4-MeAcCyHe) was further identified by ¹H and ¹³C NMR spectroscopy (Fig. S40 and S41).

^cSame amount of parent MOF used.

^d t = 48 h.