Toluene → 5,7-Dimethyl-3,3a,7,7a-tetrahydro-1H-4-thia-2-aza-cyclopenta[alpha]pentalene-2-carboxylic acid ethyl ester

HRID 30262

反応式

HRID 30262 の反応式
[CH2:1]([O:3][C:4]([N:6]1[CH2:13][CH:12]2[CH:8]([CH:9]([CH3:18])[C:10]3[CH:16]=[C:15](Br)[S:14][C:11]=32)[CH2:7]1)=[O:5])[CH3:2].[CH3:19][Zn]C.C1(C)C=CC=CC=1>O1CCOCC1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[CH2:1]([O:3][C:4]([N:6]1[CH2:13][CH:12]2[CH:8]([CH:9]([CH3:18])[C:10]3[CH:16]=[C:15]([CH3:19])[S:14][C:11]=32)[CH2:7]1)=[O:5])[CH3:2]

参加物

6

反応物 3

HCID 1140TolueneHCID 1317270345-Bromo-7-methyl-3,3a,7,7a-tetrahydro-1H-4-thia-2-aza-cyclopenta[alpha]pentalene-2-carboxylic acid ethyl esterHCID 178477796HCID 178477796、化合物

生成物 1

HCID 1317270365,7-Dimethyl-3,3a,7,7a-tetrahydro-1H-4-thia-2-aza-cyclopenta[alpha]pentalene-2-carboxylic acid ethyl ester収率 95%

試薬・触媒・溶媒 2

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)触媒HCID 312751,4-Dioxane溶媒

反応条件

温度
22 °C

実験手順

A solution of the product from step j) (284 mg, 0.86 mmol) in dioxane (4.3 ml) was treated with Pd(dppf)2Cl2 (42 mg, 0.051 mmol) and a 2M solution of dimethylzinc in toluene (0.86 ml, 1.72 mmol) at 102° C. for 1 hour. The reaction was cooled to 22° C. and carefully quenched with sat. NH4Cl (3 ml). After the effervescence subsided, the reaction was extracted with EtOAc (3×50 ml). The combined organic layers were dried (MgSO4) passed through a plug of silica-gel eluting with 50:50 hexanes:EtOAc to provide the subtitle compound (216 mg, 95% over 3-steps). MS calculated for C14H19NO2S+H 266, observed 266.

後処理

  1. customcarefully quenched with sat. NH4Cl (3 ml)
  2. extractionthe reaction was extracted with EtOAc (3×50 ml)
  3. dry with materialThe combined organic layers were dried (MgSO4)
  4. washeluting with 50:50 hexanes

出典と根拠

ORDレコード
ord-f161ac2f1f7944ba8d2010d388c80939
出典データセット
uspto-grants-2008_09
特許番号
US07423056B2

関連ノート

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