Synthesis of 1 starts from compound 2. Compound 2 is first converted to compound 3, and then reacted with 4 to afford compound 5. BnO Bno OBn BnO Mg → 3 4 HO, solvent A BnO OBn 2 2a. Draw the structures of compound 3 and solvent A. 2b. Compound 4 is in a protected form. Draw out its deprotected form 4a and the condition for conversion from 4 to 4a. 2c. Compound 4 may also be converted to 4b and 4c under respective conditions. Draw structures of 4b and 4c. BnO EENH2 1. LIAIH4, ether 4b 4c Bnơ OBn 2. H30* 4

1. How many chiral centers are there in the following molecule? Identify them with an asterisk. a) لم بشه Br b)

Label each of the following chiral centers as R or S.

Locate chiral centers and identify the configuration. I need help   understanding which direction the carbon bonded to the dashed CH2 and wedged CH3 is.  (Please don't use hend raiting)

Assign the configuration of the chiral center in the following compound. OS COR Hint Save for Later

erences) Draw a structural formula of the SR configuration of the compound shown below. CH3 S NR HO Use the wedge/hash bond tools to indicate stereochemistry where it exists. Include H atoms at chiral centers only If a group is achiral, do not use wedged or hashed bonds on it. ood

Is this compound meso?

Draw a structural formula of the RR configuration of the compound shown below. Mastered R OH R AFFIL CH3 • Use the wedge/hash bond tools to indicate stereochemistry where it exists. • Include H atoms at chiral centers only. • If a group is achiral, do not use wedged or hashed bonds on it. Sn [F ? ChemDoodle Ⓡ

2. Identify the following molecules as chiral or achiral. e) f) Br OH ч к ОН h) ОН

draw the remaining product of the reaction