Table 4. UiO-68[Au1]_4.5%-catalyzed homo and cross [2 + 2] dimerization of alkenes^a.

^aConditions: reactions (homodimerization for 7a–7c) were carried out with 0.2 mmol of 2-vinylnaphthalene, 6a or 6c and 5 mg of UiO-68[Au1]_4.5% in MeCN (2 mL) at room temperature under argon and 410 nm irradiation for 30 h^a/16 h^b/2 h^c; reactions (cross dimerization for 7d–7l) were performed with 0.1 mmol of 2-vinylnaphthalene, 0.3 mmol of aryl terminal alkene or methyl/ethyl cinnamate, and 1 mol% UiO-68[Au1]_4.5% in MeCN (2 mL) at room temperature under argon and 410 nm irradiation for 3 h; product yields and diastereomeric ratios (d.r.) were determined by ¹H NMR analysis from the crude reaction mixture using chlorodiphenylmethane as an internal standard. The crystal structures of anti-7c^15e and 7g are presented.