## Experimental
### Standard Procedure A: Ozonide Reduction With Solution-Phase PPh\({}_{3}\)
#### 2-Formylbenzenerepompanal (**11c**)
###### Abstract  
We present a new _2-Formylbenzene_-propanal (10c) (100 mg, 0.77 mmol) in CH\({}_{2}\)Cl\({}_{2}\) (30 mL) was prepared as described in standard procedure A. PEG-PPh\({}_{3}\) (3.08 g, 1.54 mmol) was added in one portion and the resulting solution was allowed to warm to room temperature and stirred for 2 h. The reaction mixture was then concentrated (to 5 mL) _in vacuo_ and added dropwise to vigorously stirring diethyl ether (200 mL). The precipitate was removed by filtration and washed with diethyl ether (50 mL). The filtrate and washings were then concentrated (10 mL) _in vacuo_ and passed through a pad of silica gel (1 cm\(\times\) 2 cm). The eluant was evaporated to dryness to give the dialdehyde **11c** (121 mg, 97%) as a colorless oil. pacs: _Molecules_**2000**, \(5\)  
Standard Procedure B: Ozonide Reduction With Liquid-Phase PPh\({}_{3}\) reagent  
_2-Formylbenzenerepropanal (11c)_  
A solution of the ozonide of 1,2-dihydronaphthalene (**10c**) (100 mg, 0.77 mmol) in CH\({}_{2}\)Cl\({}_{2}\) (30 mL) was prepared as described in standard procedure A. Resin-bound PPh\({}_{3}\) (513 mg, 1.54 mmol) was added in one portion and the resulting solution was allowed to warm to room temperature and stirred for 2 h. The resin was removed by filtration and washed with CH\({}_{2}\)Cl\({}_{2}\) (250 mL). The filtrate and washings were then concentrated (10 mL) _in vacuo_ and passed through a pad of silica gel (1 cm\(\times\) 2 cm). The eluant was evaporated to dryness to give the dialdehyde **11c** (75 mg, 60%) as a colorless oil. Standard Procedure D: Wittig reactions in aqua with Liquid-Phase Phosphonium Salt **3**  
_4-Nitrostilbene (14a)_  
Wittig salt **12** (200 mg, 0.10 mmol) and **13a** (70 mg, 0.46 mmol) were dissolved in a solution of 1 N NaOH (4.6 mL) and water (1 mL). The reaction mixture was then stirred at either room temperature (Table 2, entry 1) or 90\({}^{\circ}\)C (Table 2, entry 2). The reaction mixture was then diluted with CH\({}_{2}\)Cl\({}_{2}\) (100 mL) and anhydrous MgSO\({}_{4}\) was added with vigorous stirring. The desiccant was then removed by filtration and washed with CH\({}_{2}\)Cl\({}_{2}\). The combined filtrate and washings were concentrated _in vacuo_ (to 3 mL) and then added dropwise to vigorously stirring diethyl ether (100 mL). The precipitate was removed by filtration and washed with diethyl ether (20 mL). The filtrate and washings were then concentrated (2 mL) _in vacuo_ and passed through a pad of silica gel (1 cm\(\times\) 2 cm). The eluant was evaporated to dryness to give a mixture of the \(E\):\(Z\) stilbenes **14a** (Table 2, entry 1; 45 mg, 65%. Table 2, entry 2; 43 mg, 62%) as a pale yellow oil. _Regeneration of PEG-(OPhPPh\({}_{2}\))\({}_{2}\) (2)_  
PEG-phosphine oxide **9** (200 mg, 0.1 mmol) was dissolved in THF (2.5 mL) and cooled (0\({}^{\circ}\)C). Freshly prepared alane [44] 0.5 M in THF (0.25 mL) was added dropwise. The reaction mixture was then allowed to warm to room temperature and stirred for 30 min. The reaction mixture was thencooled (0\({}^{\circ}\)C) and quenched with MeOH (0.3 mL). The crude mixture was filtered through a short pad of Celite, the clear filtrate was then concentrated _in vacuo_ (to 4 mL) and added dropwise into vigorously stirring degassed diethyl ether (50 mL). The precipitate was collected by filtration, washed with diethyl ether (30 mL) and dried _in vacuo_ to give reagent **2** (150 mg, 75%) as an ivory solid. Standard Procedure E: Stille Coupling of PEG-bound iodo benzoate and Transesterification with KCN/MeOH  
_Stille Coupling_  
In a typical procedure MeO-PEG\({}_{5000}\) bound _para_-iodobenzoate **15a** (1.0 g, 191 \(\mu\)mol) was dissolved in a degassed anhydrous solution of LiCl (79 mg, 1.91 mmol) in DMF (5 mL). Dichlorobis(triphenyl phosphine)-palladium(II) (13 mg, 19 \(\mu\)mol) and tributyl-phenylstannane (187 \(\mu\)L, 574 \(\mu\)mol) were then added.