1,1-Dimethyl-ethyl ester

S-(l-methylethyl) ester, sodium salt [26726-19-21,58, 147, 151 Thiotricarbonic acid, bis( 1,1-dimethyl-ethyl) ester [22085-39-8], 57,49 Toluene [108-88-3], 58, 125... 

N-tert-Butoxycarbonyl-L-1euc1nal Carbatnic acid, (1-formyi-3-methylbutyl)-, 1,1-dimethyl ethyl ester, (S)- (9) (58521-45-2)... 

In an alternate approach, the substrate was also generated from methyl-2-chloro-3,3-dimethyloxiran carboxylate and the corresponding isopropyl and 1,1-dimethyl ethyl ester by treatment with sodium bicarbonate and sodium hydroxide. In this process, an overall reaction yield of 98% and an EE of 99.8% were obtained for the l-P-hydroxy valine 89. 

Benzyloxycarbonyl-L-aspartyl-(tert-butyl ester)-L-phenylalanine L-Phenylalani ne, N-[N-[(phenylraethoxy)carbonyl]-L-a-aspartyl]-, 4-(1,1-dimethyl ethyl) ester (10) (32771-88-3)... 

The synthesis of dipeptidyl peptidase-IV (DPP4) inhibitor, Saxagliptin 32 (Figure 11.8) required (5S)-5-aminocarbonyl-4,5-dihydro-lH-pyrrole-l-carboxylicacid,l-( 1,1-dimethyl ethyl)-ester 33 [82-84], Direct chemical am-monolyses were hindered by the requirement for aggressive reaction conditions, which resulted in unacceptable levels of amide racemization and side-product... 

Atazanavir enzymatic preparation of (1 /9-[3-chloit>-2-hydroxy-1-(phenylinethyl) propylj-carbamic acid,1,1-dimethyl-ethyl ester. 

CHLORO-2-HYDROXY-1 (PHENYLMETHYL) PROPYLJ-CARBAMIC ACID, 1,1-DIMETHYL-ETHYL ESTER... 

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