5-{(R)-2-[(2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-1-(4-nitro-benzyloxycarbonylmethyl)-4-oxo-azetidin-2-yl]-propionyl}-4-oxo-3-phenyl-1-oxa-5-aza-spiro[5.5]undec-2-ene-2-carboxylic acid methyl ester

Base Information

Chemical Name:5-{(R)-2-[(2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-1-(4-nitro-benzyloxycarbonylmethyl)-4-oxo-azetidin-2-yl]-propionyl}-4-oxo-3-phenyl-1-oxa-5-aza-spiro[5.5]undec-2-ene-2-carboxylic acid methyl ester
CAS No.:397887-06-8
Molecular Formula:C₄₀H₅₁N₃O₁₁Si
Molecular Weight:777.944
Hs Code.:

5-{(R)-2-[(2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-1-(4-nitro-benzyloxycarbonylmethyl)-4-oxo-azetidin-2-yl]-propionyl}-4-oxo-3-phenyl-1-oxa-5-aza-spiro[5.5]undec-2-ene-2-carboxylic acid methyl ester

Synonyms:5-{(R)-2-[(2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-1-(4-nitro-benzyloxycarbonylmethyl)-4-oxo-azetidin-2-yl]-propionyl}-4-oxo-3-phenyl-1-oxa-5-aza-spiro[5.5]undec-2-ene-2-carboxylic acid methyl ester

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Chemical Property of 5-{(R)-2-[(2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-1-(4-nitro-benzyloxycarbonylmethyl)-4-oxo-azetidin-2-yl]-propionyl}-4-oxo-3-phenyl-1-oxa-5-aza-spiro[5.5]undec-2-ene-2-carboxylic acid methyl ester

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Technology Process of 5-{(R)-2-[(2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-1-(4-nitro-benzyloxycarbonylmethyl)-4-oxo-azetidin-2-yl]-propionyl}-4-oxo-3-phenyl-1-oxa-5-aza-spiro[5.5]undec-2-ene-2-carboxylic acid methyl ester

There total 7 articles about 5-{(R)-2-[(2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-1-(4-nitro-benzyloxycarbonylmethyl)-4-oxo-azetidin-2-yl]-propionyl}-4-oxo-3-phenyl-1-oxa-5-aza-spiro[5.5]undec-2-ene-2-carboxylic acid methyl ester 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: 90.0%

: 16869-24-2
4-nitrobenzyl bromoacetate

: 397886-97-4
5-((R)-2-{(2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-4-oxo-azetidin-2-yl}-propionyl)-4-oxo-3-phenyl-1-oxa-5-aza-spiro[5.5]undec-2-ene-2-carboxylic acid methyl ester

: 397887-06-8
5-{(R)-2-[(2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-1-(4-nitro-benzyloxycarbonylmethyl)-4-oxo-azetidin-2-yl]-propionyl}-4-oxo-3-phenyl-1-oxa-5-aza-spiro[5.5]undec-2-ene-2-carboxylic acid methyl ester

Guidance literature:: With sodium hexamethyldisilazane; In tetrahydrofuran;
DOI:10.1055/s-2001-18778

Reference yield:

: 619-73-8
4-nitrobenzyl chloride

: 397887-06-8
5-{(R)-2-[(2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-1-(4-nitro-benzyloxycarbonylmethyl)-4-oxo-azetidin-2-yl]-propionyl}-4-oxo-3-phenyl-1-oxa-5-aza-spiro[5.5]undec-2-ene-2-carboxylic acid methyl ester

Guidance literature:: Multi-step reaction with 2 steps

1: pyridine / CH₂Cl₂ / 0 °C

2: 90 percent / NaHMDS / tetrahydrofuran

With pyridine; sodium hexamethyldisilazane; In tetrahydrofuran; dichloromethane;
DOI:10.1055/s-2001-18778

Reference yield:

: 108-94-1,11119-77-0,9003-41-2,9075-99-4
cyclohexanone

: 397887-06-8
5-{(R)-2-[(2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-1-(4-nitro-benzyloxycarbonylmethyl)-4-oxo-azetidin-2-yl]-propionyl}-4-oxo-3-phenyl-1-oxa-5-aza-spiro[5.5]undec-2-ene-2-carboxylic acid methyl ester

Guidance literature:: Multi-step reaction with 4 steps

1: 80 percent / Ac₂O; H₂SO₄ / acetic acid

2: 92 percent / pyridine / tetrahydrofuran

3: 80 percent / Zn / tetrahydrofuran / Heating

4: 90 percent / NaHMDS / tetrahydrofuran

With pyridine; sulfuric acid; sodium hexamethyldisilazane; acetic anhydride; zinc; In tetrahydrofuran; acetic acid; 3: Reformatsky-type reaction;
DOI:10.1055/s-2001-18778