2-Naphthalenesulfonyl chloride → HCID 53771252, compound

HRID 234849Notes

Reaction equation

C1(C)C=CC(S(O)(=O)=O)=CC=1.[CH2:12]([O:19][C:20](=[O:30])[C@@H:21]([CH2:23][C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)[NH2:22])[C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1.C(N(CC)CC)C.[CH:38]1[C:47]2[C:42](=[CH:43][CH:44]=[CH:45][CH:46]=2)[CH:41]=[CH:40][C:39]=1[S:48](Cl)(=[O:50])=[O:49]>C(Cl)Cl>[CH2:12]([O:19][C:20](=[O:30])[C@@H:21]([CH2:23][C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)[NH:22][S:48]([C:39]1[CH:40]=[CH:41][C:42]2[C:47](=[CH:46][CH:45]=[CH:44][CH:43]=2)[CH:38]=1)(=[O:50])=[O:49])[C:13]1[CH:14]=[CH:15][CH:16]=[CH:17][CH:18]=1

Participants

Conditions

Temperature: 0 °C

Procedure

A solution of 10 g of (D)-phenylalanine benzyl ester p-toluenesulphonate in 150 ml of methylene chloride is treated with 8.2 ml of triethylamine and cooled to 0° C. 5.8 g of 2-naphthylsulphonyl chloride are added thereto and the mixture is stirred at room temperature for 12 hours. The reaction mixture is evaporated, the residue is taken up in 200 ml of ethyl acetate, the precipitated triethylammonium chloride salt is filtered off under suction and the mother liquor is washed with water. After evaporation of the organic phase and crystallization from hexane there are obtained 9.7 g of N-(2-naphthylsulfonyl)-3-phenyl-D-alanine benzyl ester, m.p. 107° C.

Workup

customThe reaction mixture is evaporated
filtrationthe precipitated triethylammonium chloride salt is filtered off under suction
washthe mother liquor is washed with water
customAfter evaporation of the organic phase and crystallization from hexane

Sources & evidence

ORD record: ord-7e7a31e091b44ab4994efd20d8774b1f
Source dataset: uspto-grants-1997_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05595999

Reaction notes

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