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【结 构 式】

【分子编号】53339

【品名】methyl (2S)-2-{[(benzyloxy)carbonyl]amino}-3-(4-hydroxyphenyl)propanoate

【CA登记号】n/a

【 分 子 式 】C18H19NO5

【 分 子 量 】329.3526

【元素组成】C 65.64% H 5.81% N 4.25% O 24.29%

与该中间体有关的原料药合成路线共 2 条

合成路线1

该中间体在本合成路线中的序号:(III)

The borinated tyrosine intermediate (VII) has been obtained as follows: The esterification of L-tyrosine (I) with SOCl2 and methanol gives the methyl ester (II), which is N-protected with Cbz-Cl and K2CO3 to yield the carbamate (III). The O-protection of (III) with benzyl bromide and Cs2CO3 affords the benzyl ether (IV), which is iodinated with I2 and Ag2SO4 to provide the 3-iodotyrosine derivative (V). Finally, the borylation of (V) by means of pinacolatodiborane (VI) catalyzed by PdCl2[bis(diphenylphosphanyl)ferrocene] (PdCl2(dppf)) gives rise to the target tyrosine intermediate (VII).

1 Lin, S.N.; Danishefsky, S.J.; The total synthesis of proteasome inhibitors TMC-95A and TMC-95B: Discovery of a new method to generate cis-propenyl amides. Angew Chem. Int Ed 2002, 41, 3, 512.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 48794 (S)-(-)-Tyrosine; (S)-2-Amino-3-(4-hydroxyphenyl)propionic acid; 3-(4-Hydroxyphenyl)-L-alanine; L-(-)-Tyrosine; L-3-(4-Hydroxyphenyl)alanine; L-4-Hydroxy-17O-phenylalanine; L-beta-(p-Hydroxyphenyl)alanine; L-Hydroxy Phenyl Alanine; L-tyrosine 60-18-4 C9H11NO3 详情 详情
(II) 21431 methyl (2S)-2-amino-3-(4-hydroxyphenyl)propanoate 1080-06-4 C10H13NO3 详情 详情
(III) 53339 methyl (2S)-2-{[(benzyloxy)carbonyl]amino}-3-(4-hydroxyphenyl)propanoate n/a C18H19NO5 详情 详情
(IV) 53340 methyl (2S)-2-{[(benzyloxy)carbonyl]amino}-3-[4-(benzyloxy)phenyl]propanoate n/a C25H25NO5 详情 详情
(V) 53341 methyl (2S)-2-{[(benzyloxy)carbonyl]amino}-3-[4-(benzyloxy)-3-iodophenyl]propanoate n/a C25H24INO5 详情 详情
(VI) 53342 4,4,4',4',5,5,5',5'-Octamethyl-2,2'-bi-1,3,2-dioxaborolane; Bis(pinacolato)diboron; Diboron pinacol ester 73183-34-3 C12H24B2O4 详情 详情
(VII) 53343 methyl (2S)-2-{[(benzyloxy)carbonyl]amino}-3-[4-(benzyloxy)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]propanoate n/a C31H36BNO7 详情 详情

合成路线2

该中间体在本合成路线中的序号:(III)

The borinated tyrosine intermediate (VII) has been obtained as follows: The esterification of L-tyrosine (I) with SOCl2 and methanol gives the methyl ester (II), which is N-protected with Cbz-Cl and K2CO3 to yield the carbamate (III). The O-protection of (III) with benzyl bromide and Cs2CO3 affords the benzyl ether (IV), which is iodinated with I2 and Ag2SO4 to provide the 3-iodotyrosine derivative (V). Finally, the borylation of (V) by means of pinacolatodiborane (VI) catalyzed by PdCl2[bis(diphenylphosphanyl)ferrocene] (PdCl2(dppf)) gives rise to the target tyrosine intermediate (VII).

1 Lin, S.N.; Danishefsky, S.J.; The total synthesis of proteasome inhibitors TMC-95A and TMC-95B: Discovery of a new method to generate cis-propenyl amides. Angew Chem. Int Ed 2002, 41, 3, 512.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 48794 (S)-(-)-Tyrosine; (S)-2-Amino-3-(4-hydroxyphenyl)propionic acid; 3-(4-Hydroxyphenyl)-L-alanine; L-(-)-Tyrosine; L-3-(4-Hydroxyphenyl)alanine; L-4-Hydroxy-17O-phenylalanine; L-beta-(p-Hydroxyphenyl)alanine; L-Hydroxy Phenyl Alanine; L-tyrosine 60-18-4 C9H11NO3 详情 详情
(II) 21431 methyl (2S)-2-amino-3-(4-hydroxyphenyl)propanoate 1080-06-4 C10H13NO3 详情 详情
(III) 53339 methyl (2S)-2-{[(benzyloxy)carbonyl]amino}-3-(4-hydroxyphenyl)propanoate n/a C18H19NO5 详情 详情
(IV) 53340 methyl (2S)-2-{[(benzyloxy)carbonyl]amino}-3-[4-(benzyloxy)phenyl]propanoate n/a C25H25NO5 详情 详情
(V) 53341 methyl (2S)-2-{[(benzyloxy)carbonyl]amino}-3-[4-(benzyloxy)-3-iodophenyl]propanoate n/a C25H24INO5 详情 详情
(VI) 53342 4,4,4',4',5,5,5',5'-Octamethyl-2,2'-bi-1,3,2-dioxaborolane; Bis(pinacolato)diboron; Diboron pinacol ester 73183-34-3 C12H24B2O4 详情 详情
(VII) 53343 methyl (2S)-2-{[(benzyloxy)carbonyl]amino}-3-[4-(benzyloxy)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]propanoate n/a C31H36BNO7 详情 详情
Extended Information