2,2-Dimethyl-propionic acid (2R,3R,4S,5S,6R)-2-but-(E)-ylideneamino-3,5-bis-(2,2-dimethyl-propionyloxy)-6-(2,2-dimethyl-propionyloxymethyl)-tetrahydro-pyran-4-yl ester | 121675-83-0

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: 2,2-Dimethyl-propionic acid (2R,3R,4S,5S,6R)-2-but-(E)-ylideneamino-3,5-bis-(2,2-dimethyl-propionyloxy)-6-(2,2-dimethyl-propionyloxymethyl)-tetrahydro-pyran-4-yl ester
• 英文别名: [(2R,3S,4S,5R,6R)-6-[(E)-butylideneamino]-3,4,5-tris(2,2-dimethylpropanoyloxy)oxan-2-yl]methyl 2,2-dimethylpropanoate
• CAS: 121675-83-0
• 化学式: C₃₀H₅₁NO₉
• 分子量: 569.736
• InChiKey: JFCVWAITQMGZLW-HXGFMWRESA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.9
• 重原子数：
  40
• 可旋转键数：
  16
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.83
• 拓扑面积：
  127
• 氢给体数：
  0
• 氢受体数：
  10

反应信息

• 作为反应物：
  描述：

  2,2-Dimethyl-propionic acid (2R,3R,4S,5S,6R)-2-but-(E)-ylideneamino-3,5-bis-(2,2-dimethyl-propionyloxy)-6-(2,2-dimethyl-propionyloxymethyl)-tetrahydro-pyran-4-yl ester 在 Ra-Ni 盐酸 、 zinc chloride diethyl ether 、 三氟化硼 、 L-Selectride 、 1,2-乙二硫醇 作用下， 以 四氢呋喃 、 甲醇 、 水 为溶剂， 生成 2,3,4,6-tetra-O-pivaloyl-D-galactopyranose
  参考文献：
  名称：

  Kunz, Horst; Pfrengle, Waldemar, Angewandte Chemie, 1989, vol. 101, # 8, p. 1041 - 1042

  摘要：

  DOI：
• 作为产物：
  描述：

  2,3,4,6-四-O-叔戊酰基-beta-D-吡喃半乳糖胺 、 正丁醛 生成 2,2-Dimethyl-propionic acid (2R,3R,4S,5S,6R)-2-but-(E)-ylideneamino-3,5-bis-(2,2-dimethyl-propionyloxy)-6-(2,2-dimethyl-propionyloxymethyl)-tetrahydro-pyran-4-yl ester
  参考文献：
  名称：

  Palladium-catalysed C–C coupling reactions in the enantioselective synthesis of 2,4-disubstituted 4,5-dehydropiperidines using galactosylamine as a stereodifferentiating auxiliary

  摘要：

  Stereoselective synthesis of enantiomerically pure 2,4-disubstituted piperidine derivatives, which are considered interesting pharmacophoric structures, was achieved starting with a tandem Mannich-Michael reaction sequence on O-pivaloylated N-galactosyl aldimines. Subsequent conversion of the thus formed 2-substituted dehydropiperidinones into the corresponding enol tri-flates was carried out by conjugate hydride addition and trapping the enolate with N,N-bis(trifluoromethanesulfonyl)aniline. Their Suzuki-Miyaura coupling with aryl and heteroaryl boronic acids was performed under, conditions compatible with the carbohydrate structure, in particular, with the sensitive N-glycosidic bond. (C) 2004 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2004.11.074

文献信息

• Enantioselective Syntheses of 2-Alkyl-, 2,6-Dialkylpiperidines and Indolizidine Alkaloids Through Diastereoselective Mannich-Michael Reactions
  作者：Markus Weymann、Waldemar Pfrengle、Dieter Schollmeyer、Horst Kunz

  DOI：10.1055/s-1997-3185

  日期：1997.10

  Aldimines of 2,3,4,6-tetra-0-pivaloyl-β-D-galactosylamine react with 1-methoxy-3-trimethylsilyloxybuta-1,3-diene in a Mannich-Michael condensation reaction sequence to give 2-substituted N-galactosyl-5,6-dehydropiperidin-4-ones 3 with high diastereoselectivity. The X-ray analysis of the 2-propyl derivative 3a proved (R)-configuration of the major diastereomer and led to the correction of our earlier assignment of configuration for (-)-coniine hydrochloride 9a obtained from this intermediate. Despite their low reactivity, these enaminones 3 can be converted into chiral 2,6-cis-disubstituted piperidinones 12 with high stereoselectivity by reaction with organocuprates in combination with hard electrophiles. Enantiomerically pure alkaloids such as (-)-dihydropinidine and gephyrotoxine 167B have been synthesized according to this methodology.

  2,3,4,6-四-O-特戊酰基-β-D-半乳糖胺的烯胺与1-甲氧基-3-三甲基硅氧基丁-1,3-二烯在曼尼希-迈克尔缩合反应序列中反应，以高非对映选择性得到2-取代的N-半乳糖基-5,6-脱氢哌啶-4-酮3。2-丙基衍生物3a的X射线分析证实了主要非对映异构体的(R)构型，并纠正了我们之前对该中间体得到的(-)-毒芹碱盐酸盐9a的构型分配。尽管这些烯胺酮3的反应性较低，但通过与有机铜酸盐和硬亲电试剂的反应，可以高立体选择性地将其转化为手性的2,6-顺式-二取代哌啶酮12。根据这一方法，已经合成了高对映纯度的生物碱，如(-)-二氢矮牵牛素和gephyrotoxine 167B。
• Carbohydrate Auxiliaries in Stereoselective Syntheses of Decahydroquinoline Alkaloids
  作者：Markus Weymann、Martin Schulz-Kukula、Stephan Knauer、Horst Kunz

  DOI：10.1007/s007060200030

  日期：2002.4.1

  as the chiral auxiliary, both trans - and cis -annelated decahydroquinoline alkaloids can be synthesized stereoselectively. This methodology of asymmetric synthesis is based on the effect that both enantiomers of 2,6-disubstituted piperidin-4-ones are selectively and alternatively accessible using the auxiliary as the identical stereodifferentiating tool. In addition, the carbohydrate auxiliary controls

   使用四-O-新戊酰β- d -galactopyranosylamine作为手性助剂，既 反式 -和 顺 -annelated十氢喹啉生物碱可立体选择性地合成。这种不对称合成的方法基于以下效果：使用辅助剂作为相同的立体分化工具，可以选择性地或替代地获得2,6-二取代的哌啶-4-酮的两个对映体。另外，碳水化合物助剂控制通过将铜酸酯共轭添加至N-半乳糖基八氢喹啉-4-酮而形成的烯醇的立体选择性质子化。 反式 -4a- epi- pumiliotoxin C 和顺式 -4a- epi 的合成 -perhydro-219A说明了十氢喹啉生物碱的不对称合成概念。
• Kunz, Horst; Schanzenbach, Dirk, Angewandte Chemie, 1989, vol. 101, # 8, p. 1042 - 1043
  作者：Kunz, Horst、Schanzenbach, Dirk

  DOI：——

  日期：——
• Carbohydrates as chiral templates: diastereoselective synthesis of N-glycosyl-N-homoallylamines and .beta.-amino acids from imines
  作者：Sabine Laschat、Horst Kunz

  DOI：10.1021/jo00020a033

  日期：1991.9

  Complexing properties and chirality of carbohydrates were utilized in diastereoselective reactions of O-pivaloylated N-galactosylimines with allylsilanes and -stannanes. With allyltrimethylsilane in the presence of SnCl4, imines 2 of aromatic and heteroaromatic aldehydes were converted to homoallylamines 3, giving ratios of diastereomers higher than 7:1. No addition products derived from alpha-anomeric aromatic imines were formed. Aliphatic homoallylamines 3 were synthesized by using allyltributylstannane in the presence of SnCl4. Both alpha- and beta-anomeric aliphatic imines reacted with the allylstannane. They gave the same ratio of diastereomers and showed the same sense of asymmetric induction.
• Kunz, Horst; Pfrengle, Waldemar, Angewandte Chemie, 1989, vol. 101, # 8, p. 1041 - 1042
  作者：Kunz, Horst、Pfrengle, Waldemar

  DOI：——

  日期：——