amide comprises a deprotonated chiral auxiliary as defined above in can alternatively be used with a non chiral auxiliary, i.e., an auxiliary as defined above wherein {HEAD ~ each} of {TAIL ~ R12} and R13 are hydrogen 
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amide comprises a deprotonated chiral auxiliary as defined above in can alternatively be used with a non chiral auxiliary , i.e. , an auxiliary as defined above wherein { HEAD ~ each } of { TAIL ~ R12 } and R13 are hydrogen
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH