Sulfamates could be conveniently synthesized from phenols and were compatible with our optimized protocol (Scheme 5, Entry 1). Products with a variety of substituent patterns could be prepared, including [6,4]-spirocycles (Scheme 5, Entry 2). Substrates with cis α,β-unsaturated esters (Scheme 5, Entries 5, 7, 8, 9, and 11) cyclized with efficiencies comparable to related ones bearing trans α,β-unsaturated esters. 7membered rings could be forced to form, but the efficiency of cyclization dropped (Scheme 5, Entry 6); the bond angle of the sulfamate tether strongly favors the formation of 6-membered rings. Overall, the diastereoselectivity of this reaction was excellent, and, in many cases, a single diastereomer of product was furnished within the limits of 1 H NMR detection (Scheme 5, Entries 4, 6, 7, 8, 9, and 11). Our optimized protocol tolerated a variety of functional groups including TBS, methyl, and benzyl ethers (Scheme 5, Entries 8 and 9). In addition to sulfamates, sulfamides were also compatible with the reaction conditions and gave 1,3-diamine products (Scheme 5, Entry 12).