Scheme 1. Synthesis of Ropinirole-Based Targets with Multifunctional Cross-Linkers (a) (i) MsCl, TEA, CH₂Cl₂, 74%; (ii) NaN₃, H₂O, 72%; (iii) polymer-bound PPh₃, 22%; (iv) N-propylamine, reflux 29%. (b) (i) CsCO₃, KI, 14, 33% for 5, 10% for 3; (ii) EDC-HCl, HATU, DIPEA, 15, 27% for 6; 32% for 4.