Scheme 2.

Scope for the nitration with isolated salts 1. Reaction conditions as in Table 1 with 1 (0.5 mmol). Yields are those of isolated products. [a] NaOTf (1 equiv) was added. [b] NaNO₂ (3 equiv) was used. [c] In CH₂Cl₂/H₂O 1:1. [d] 7 mmol scale.