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CAS 71989-16-7
N2-[(9H-Fluoren-9-ylmethoxy)carbonyl]-L-asparagine
Codes: Atosiban-142
Application context (from source-drug indications)
产科分娩（早产）Atosiban acetate早产（孕37周前）Atosiban acetateEndometriosisAtosiban acetate
Source drugs (routes using this intermediate)
| Drug | Tier | Expiry |
|---|---|---|
| Atosiban acetate | Tier C — Watch / trade | - |
Position in synthesis routes (up/downstream chain)
Ordered by route registration; left → right is the synthesis direction. The highlighted node is the current CAS; others link to their own profiles.
1-[[(9H-Fluoren-9-yl)methoxy]carbonyl]-L-prolyl-N5-(tert-butoxycarbonyl)-L-ornithine→Glycinamide→Resin bound S-(triphenylmethyl)-L-cysteinyl-L-prolyl-L-ornithylglycinamide→1-[[(9H-Fluoren-9-yl)methoxy]carbonyl]-L-prolyl-N5-(tert-butoxycarbonyl)-L-ornithylglycinamide→1-[[(9H-Fluoren-9-yl)methoxy]carbonyl]-L-prolyl-L-ornithylglycinamide→Resin bound L-prolyl-L-ornithylglycinamide→N2-[(9H-Fluoren-9-ylmethoxy)carbonyl]-L-asparagine→Resin bound L-asparaginyl-S-(triphenylmethyl)-L-cysteinyl-L-prolyl-L-ornithylglycinamide→N-[[(9H-Fluoren-9-yl)methoxy]carbonyl]-L-threonine→Resin bound L-threonyl-L-asparaginyl-S-(triphenylmethyl)-L-cysteinyl-L-prolyl-L-ornithylglycinamide→N-(9-Fluorenylmethoxycarbonyl)-L-proline<-fgf->1-[(9H-Fluoren-9-ylmethoxy)carbonyl]-L-proline→N5-(tert-Butoxycarbonyl)-L-ornithine<-fgf->Nalpha-tert-Butoxycarbonyl-L-ornithine<-fgf->Nalpha-Boc-L-ornithine<-fgf->N2-Boc-L-ornithine<-fgf->(2S)-5-Amino-2-{[(tert-butoxy)carbonyl]amino}pentanoic acid→N-(9-Fluorenylmethoxycarbonyl)-S-trityl-L-cysteine<-fgf->N-[[(9H-Fluoren-9-yl)methoxy]carbonyl]-S-(triphenylmethyl)-L-cysteine
S-(Triphenylmethyl)-L-cysteine→N2-[[(9H-Fluoren-9-yl)methoxy]carbonyl]-L-asparaginyl-S-(triphenylmethyl)-L-cysteine→Resin bound L-prolyl-L-ornithylglycinamide→N2-[(9H-Fluoren-9-ylmethoxy)carbonyl]-L-asparagine→Resin bound L-asparaginyl-S-(triphenylmethyl)-L-cysteinyl-L-prolyl-L-ornithylglycinamide
Resin bound 9H-fluoren-9-ylmethyl (2-amino-2-oxoethyl)carbamate→Resin bound Gly-NH→N5-[1-(4,4-Dimethyl-2,6-dioxocyclohexylidene)ethyl]-N2-[[(9H-fluoren-9-yl)methoxy]carbonyl]-L-ornithine→Resin bound S-(triphenylmethyl)-L-cysteinyl-L-prolyl-N5-[1-(4,4-dimethyl-2,6-dioxocyclohexylidene)ethyl]-L-ornithylglycinamide→Resin bound Orn(Dde)-Gly-NH→Resin bound L-prolyl-N5-[1-(4,4-dimethyl-2,6-dioxocyclohexylidene)ethyl]-L-ornithylglycinamide→Resin bound Asn-Cys(Trt)-Pro-Orn(Dde)-Gly-NH→N-alpha-Fmoc-L-threonine<-fgf->N-(9H-Fluoren-9-ylmethoxycarbonyl)-L-threonine→Resin bound Thr-Asn-Cys(Trt)-Pro-Orn(Dde)-Gly→N2-[(9H-Fluoren-9-ylmethoxy)carbonyl]-L-asparagine→N-(9-Fluorenylmethoxycarbonyl)-L-proline→N-(9-Fluorenylmethoxycarbonyl)-S-trityl-L-cysteine→N-(9H-Fluoren-9-ylmethoxycarbonyl)glycine
S-(Triphenylmethyl)-L-cysteine→N2-[[(9H-Fluoren-9-yl)methoxy]carbonyl]-L-asparaginyl-S-(triphenylmethyl)-L-cysteine→Resin bound L-prolyl-N5-[1-(4,4-dimethyl-2,6-dioxocyclohexylidene)ethyl]-L-ornithylglycinamide→N2-[(9H-Fluoren-9-ylmethoxy)carbonyl]-L-asparagine→Resin bound Asn-Cys(Trt)-Pro-Orn(Dde)-Gly-NH
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