Organic Chemistry of Drug Synthesis. Volume 7

NH

HO

CO 2 H

221

N

HO

CO 2 H

P O

iPrO

iPrO

222

(Ph 2 PO) 2 O

N

HO

iPrOiPrOPO

223

POPh 2

O

CH 3 SO 2 Cl

N

CH 3 SO 2

P O

iPrO

iPrO

224

POPh 2

O

Na 2 +S–

N

CH 3 SO 2

iPrOiPrOPO

225

S–

O

N

S

P O

iPrO

iPrO

226

O

CO 2 H

H 2 N CO 2 H

N 227

HS

iiPrOPrOP O

HN

O

228

N

HO

O

O P

Ph

Ph

O

O 2 NC 6 H 4 CH (^2) O O
CO 2 H
NH
HN
O
N
HO
O
S
HO O
229 230

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