Table 2.

Mechanochemical Reformatsky reaction using different zinc forms.

Entry	Zn form	Supplier	Conv. [%][a]	Yield [%][a]
1	zinc granular, 20–30 mesh	Sigma–Aldrich	97	81
2	zinc granular, 20 mesh	Sigma–Aldrich	99	72
3	zinc foil, 0.25 mm thick, 99.9 %	Sigma–Aldrich	99	77
4	zinc dust, <10 mm	Sigma–Aldrich	98	80
5	zinc puriss, ACS reagent, >99.9 %	Sigma–Aldrich	91	66
6	zinc shot, 10 mm dia., 2 mm thick, 99.99 %	Sigma–Aldrich	87	53
7	zinc flake, ca. 325 mesh, 99.9 %	Alfa Aesar	99	87
8	zinc wire, 0.04 in dia., 99.95 %	Alfa Aesar	95	75
9	zinc powder, 6–9 μm, 97.5 %	Alfa Aesar	99	83
10	zinc metal powder	Fisher Scientific	98	68
11	zinc, ≥99%, mossy	Acros	96	73
12	zinc foil, 0.38 mm	BDH chemicals	99	73

Reaction conditions: benzaldehyde (1 mmol), ethyl 2‐bromoacetate (1.2 mmol), zinc form as specified (2 equiv), mixer mill, 30 Hz, 2 h. [a] Conversion and yield were determined by ¹H NMR spectroscopy with mesitylene as an internal standard.