Dimethyl L-tartrate → HCID 67848361、化合物

HRID 1885397

反応式

HRID 1885397 の反応式
COC(OC)C(CCCCCC)=CC1C=CC=CC=1.C([C@@H]([C@H](C(OC)=O)O)O)(OC)=O.[CH2:32](/[C:38](/[CH:46]1[O:50][C@@H:49]([C:51]([O:53][CH3:54])=[O:52])[C@H:48]([C:55]([O:57][CH3:58])=[O:56])[O:47]1)=[CH:39]/[C:40]1[CH:45]=[CH:44][CH:43]=[CH:42][CH:41]=1)[CH2:33][CH2:34][CH2:35][CH2:36][CH3:37].[K+].[Br-]>>[CH2:32](/[C:38](/[CH:46]1[O:50][C@@H:49]([C:51]([O:53][CH3:54])=[O:52])[C@H:48]([C:55]([O:57][CH3:58])=[O:56])[O:47]1)=[CH:39]\[C:40]1[CH:45]=[CH:44][CH:43]=[CH:42][CH:41]=1)[CH2:33][CH2:34][CH2:35][CH2:36][CH3:37]

参加物

5

反応物 4

HCID 11851Dimethyl L-tartrateHCID 253877Potassium BromideHCID 3018174[2-(Dimethoxymethyl)-1-octen-1-yl]benzeneHCID 70235729HCID 70235729、化合物

生成物 1

HCID 67848361HCID 67848361、化合物

実験手順

In a fashion similar to that described in Example 4, α-hexylcinnamaldehyde dimethyl acetal and dimethyl L-tartrate were condensed to provide a mixture of (E)-and (Z)-(4R,5R)-2-(1-hexyl-2-phenyl-1-ethenyl)-4,5-dicarbomethoxy-1,3-dioxolane in an approximate ratio of 90:10 Crystallization provided the pure E-isomer, mp 49°-50° C., [α]D25 -2.2 (c, 0.2, methanol). 1H-NMR (CDCl3) δ7.35-7.26 (5H,m), 6.74 (1H,s), 5.84 (1H,s) 4.86 (1H, d, J=4.4 Hz), 4.70 (1H, d, J=4.4 Hz), 3.85 (3H,s), 3.80 (3H,s), 2.34-2.27 (2H,m), 1.58-1.55 (2H,m), 1.37-1.26 (6H,m), 0.93-0.87 (3H,m), IR (KBr) 2900, 2840, 1730, 1430, 1340, 1200, 1100, 1060, 1030, 980, 950, 915, 870, 790, 750, 730, 690 cm-1. MS m/e (% abundance) 305 (4), 292 (17), 291 (100), 145 (18), 142 (25), 131 (73), 129 (76), 128 (26), 117 (74), 116 (17), 115 (51), 104 (29), 91 (57), 59 (31), 41 (25).

後処理

  1. customcondensed
  2. customto provide
  3. customin an approximate ratio of 90:10 Crystallization
  4. customprovided the pure E-isomer, mp 49°-50° C., [α]D25 -2.2 (c, 0.2, methanol)

出典と根拠

ORDレコード
ord-89f6414b6e6440adafa95df4711f3983
出典データセット
uspto-grants-1992_09
特許番号
US05144048

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