Which of the following sequences would successfully lead to the shown product? 1. II. III. O I. only O I. and II. O II. and III. O I., II., and III. H H NaBH4 MeOH HO Ph3P= 1) 9-BBN HBr HOOH Na₂Cr₂O7 2) H₂O₂, NaOH H₂SO4, H₂O PBr3 Mgº KCN 1) CO₂ 2) H3O* H3O+ Δ

Predict the product(s) form in each reaction below.

21. For the reaction described below. CH3 Select the best reagents: a) 1. OsO4, pyridine 2. NaHSO3, H₂O b) 1. Hg(OAc)2, H₂O 2. NaBH4 c) 1. RCO3H, CH2Cl2 2. H3O+ d) 1. BH3, THF 2. H₂O2, OH CH3 "OH 20 hetos to dess the c

3. Predict the major product for the following reactions: Br Br 1. NaCN 2. H3O* Δ´ 1. NaCN 2. LAH 3. H₂0+ 1. excess MgBr 2. H

16) Reactivity of carboxylic acid 4 its derivatives. Determine which reagents are needed to complete traneformationg a) Dsocla 2) NaCl, DMSO b)) Nacl, DMSO c) D HCI, heat d) Dsocla e) ) Socla 2) Na NH3, IH] 2) Na NH3, H20 2) XSCH3 NH2 2) XS NH3

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Identify the correct reagents and conditions to perform this chemoselective reaction: H ရှုံး H Select one: Me e. Reagent(s) and conditions? a. NaBH4 b. BH3 THF Pd/BaSO4, H₂ (1 atm.), quinoline, Pb(OAC)2, MeOH d. Pd/C, H2 (1 atm.), MeOH DIBAL Me H H OH

Do the reactions below proceed in good yield from left to right as shown? a) + H₂O OH ΝΗΣ b) excess OH + trace of Na OCH2CH3 OH J. I OH + H₂N-CH3

Predict the major product for the following reaction. NaOHH,0 H. он OH H. H. HO, II III I H. HO IV V 1) I 2) || O 3) II O 4) IV O 5) v

HO 1. Predict the products of the following reactions. OH OH a. PCC (excess) b. 1. LiAlH4 THF 2. H3O+ C. Me Me cat. AcOH A, PhMe 1. Me-Li (excess) THF 2. H3O+