Table 1.

Directed heterodimer synthesis.

Entry	Unsymmetrical Sulfamidea	Diazeneb	Heterodimeric Productc
1		5d, (80)
2		5e, (88)
3		5f, (83)
4		5g, (99)
5		5h, (91)d
6	R = CF3, 6i, 57	5i, (99)	(+)-4i, 61 [60% 2-steps]

^aMixed sulfamide synthesis: 7, 13, DMAP, Et₃N, CH₂Cl₂, 0 → 23 °C. Isolated % yield of 6 after chromatography.

^bDiazene synthesis: BEMP, NCS, THF, 23 °C. Crude % yield of sensitive diazene 5 in parentheses.

^cHeterodimer synthesis: t-BuOH, hν >280 nm, 23 °C, 5 h. Isolated % yield of 4 after chromatography. Yield of 4 from 6 in brackets.

^dDBU, NCS, MeOH, 0 → 23 °C.

^ehν 300 nm, 12 h.