(1R,4S)-4-benzyl-1-isopropyl-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione

Base Information

Chemical Name:(1R,4S)-4-benzyl-1-isopropyl-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione
CAS No.:1069137-87-6
Molecular Formula:C₂₁H₂₁N₃O₂
Molecular Weight:347.417
Hs Code.:

Synonyms:(1R,4S)-4-benzyl-1-isopropyl-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione

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Chemical Property of (1R,4S)-4-benzyl-1-isopropyl-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione

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Technology Process of (1R,4S)-4-benzyl-1-isopropyl-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione

There total 2 articles about (1R,4S)-4-benzyl-1-isopropyl-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield:

: Fmoc-L-Phe-terminated Wang resin

: 103321-53-5
(S)-(9H-fluoren-9-yl)methyl 1-chloro-3-methyl-1-oxobutan-2-ylcarbamate

: 118-92-3,159201-01-1,50816-84-7,80206-34-4,104809-47-4
anthranilic acid

: 1069137-87-6
(1R,4S)-4-benzyl-1-isopropyl-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione

: (1S,4S)-4-benzyl-1-methyl-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione

Guidance literature:: Fmoc-L-Phe-terminated Wang resin; anthranilic acid; With piperidine; benzotriazol-1-ol; O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate; N-ethyl-N,N-diisopropylamine; In N,N-dimethyl-formamide; at 20 ℃; for 2h;

(S)-(9H-fluoren-9-yl)methyl 1-chloro-3-methyl-1-oxobutan-2-ylcarbamate; With N-ethyl-N,N-diisopropylamine; In chloroform; at 20 ℃; for 2h;

With zinc trifluoromethanesulfonate; In N,N-dimethyl-formamide; at 140 ℃; for 1.5h; Further stages.;
DOI:10.1016/j.tet.2008.07.071

Reference yield:

: Fmoc-L-Phe-terminated Wang resin

: 118-92-3,159201-01-1,50816-84-7,80206-34-4,104809-47-4
anthranilic acid

: 198545-90-3
Fmoc-D-Val-Cl

: 1069137-87-6
(1R,4S)-4-benzyl-1-isopropyl-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione

: (1S,4S)-4-benzyl-1-methyl-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione

Guidance literature:: Fmoc-L-Phe-terminated Wang resin; anthranilic acid; With piperidine; benzotriazol-1-ol; O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate; N-ethyl-N,N-diisopropylamine; In N,N-dimethyl-formamide; at 20 ℃; for 2h;

Fmoc-D-Val-Cl; With N-ethyl-N,N-diisopropylamine; In chloroform; at 20 ℃; for 2h;

With zinc trifluoromethanesulfonate; In N,N-dimethyl-formamide; at 140 ℃; for 1.5h; Further stages.;
DOI:10.1016/j.tet.2008.07.071