(25R)-3β-(tert-butyl(dimethyl)silyloxy)-5α-spirostan-12-one | 909880-00-8

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 异戊烯醇脂质
• 英文名称: (25R)-3β-(tert-butyl(dimethyl)silyloxy)-5α-spirostan-12-one
• 英文别名: 3β-(tert-butyldimethylsiloxy)-25(R)-5α-spirosta-12-one；(1R,2S,4S,5'R,6R,7S,8R,9S,12S,13S,16S,18S)-16-[tert-butyl(dimethyl)silyl]oxy-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icosane-6,2'-oxane]-10-one
• CAS: 909880-00-8
• 化学式: C₃₃H₅₆O₄Si
• 分子量: 544.891
• InChiKey: LPXKEZSZAHHYSB-KMUYPKFOSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  8.0
• 重原子数：
  38
• 可旋转键数：
  3
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.97
• 拓扑面积：
  44.8
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  (25R)-3β-(tert-butyl(dimethyl)silyloxy)-5α-spirostan-12-one 在 Lindlar's catalyst lithium aluminium tetrahydride 、 sodium azide 、 四丁基氟化铵 、 氢气 、 三乙胺 、 间氯过氧苯甲酸 作用下， 以 四氢呋喃 、 乙醇 、 二氯甲烷 为溶剂， 反应 62.0h， 生成 (25R)-12,13-seco-12-amino-5α-spirostane-3β,13-diol
  参考文献：
  名称：

  Synthesis of peptidomimetic-spirostane hybrids via Ugi reaction: a versatile approach for the formation of peptide–steroid conjugates

  摘要：

  A general approach towards the preparation of peptide-steroid conjugates has been addressed. Utilizing the Ugi reaction, five peptidomimetic-steroid hybrids were achieved in good to excellent yields from carboxy- and amino-spirostanes and mono-protected alpha-amino acids. Diverse synthetic routes, specially focused on the formation of secosteroids, were implemented to introduce Ugi-type functionalities at different positions of the steroidal nucleus. This versatile approach is suitable for the formation of stable conjugates of steroids with other biologically relevant molecules. (c) 2006 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2006.06.050
• 作为产物：
  描述：

  叔丁基二甲基氯硅烷 、 海柯吉宁 在 咪唑 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 3.0h， 以84%的产率得到(25R)-3β-(tert-butyl(dimethyl)silyloxy)-5α-spirostan-12-one
  参考文献：
  名称：

  Synthesis of peptidomimetic-spirostane hybrids via Ugi reaction: a versatile approach for the formation of peptide–steroid conjugates

  摘要：

  A general approach towards the preparation of peptide-steroid conjugates has been addressed. Utilizing the Ugi reaction, five peptidomimetic-steroid hybrids were achieved in good to excellent yields from carboxy- and amino-spirostanes and mono-protected alpha-amino acids. Diverse synthetic routes, specially focused on the formation of secosteroids, were implemented to introduce Ugi-type functionalities at different positions of the steroidal nucleus. This versatile approach is suitable for the formation of stable conjugates of steroids with other biologically relevant molecules. (c) 2006 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2006.06.050

文献信息

• A Biomimetic Approach to C-<i>nor</i>-D-<i>homo</i>-Steroids
  作者：Philipp Heretsch、Sebastian Rabe、Athanassios Giannis

  DOI：10.1021/ja103152k

  日期：2010.7.28

  A biomimetic three-step transformation of classical "6-6-6-5"-steroids into their C-nor-D-homo-counterparts gives an easy and fast access to this highly important substructure of natural products, as it is found in cyclopamine, and nakiterpiosin. A novel reagent combination allows for the rearrangement even of 17-keto steroids with high endoselectivity. In several examples the broadness of this strategy

  将经典的“6-6-6-5”-类固醇仿生三步转化为它们的 C-nor-D-homo-对应物，可以轻松快速地获得这种非常重要的天然产物子结构，如在环巴胺和纳克特皮辛。一种新的试剂组合允许甚至具有高内选择性的 17-酮类固醇的重排。在几个示例中，概述了该策略的广泛性。
• Effect of C-ring modifications on the cytotoxicity of spirostan saponins and related glycosides
  作者：Karell Pérez-Labrada、Ignacio Brouard、Sara Estévez、María Teresa Marrero、Francisco Estévez、Daniel G. Rivera

  DOI：10.1016/j.bmc.2012.05.018

  日期：2012.7

  Twelve C-ring modified spirostanyl glycosides were synthesized and evaluated for their cytotoxicity against the human myeloid leukemia cell line (HL-60). With the aim of assessing the influence of the hydrophobic character, the conformational flexibility and the stereochemistry of the C-ring functionalities on the cytotoxic activity, a variety of spirostanic aglycones incorporating methylene, methoxyl, alpha,beta-unsaturated ketone and lactone groups were subjected to a linear glycosylation strategy leading to glycosides derived from the 3,6-dipivaloylated beta-D-glucoside and the beta-chacotrioside moieties. The 3,6-dipivaloylated spirostanyl beta-D-glucosides showed moderate to good cytotoxic activity against HL-60, but no significant cytotoxicity against benign blood cells. However, the cytotoxicity of spirostanyl beta-chacotriosides was highly dependent on the nature of the C-ring functional groups of the steroidal aglycones. Actually, the chacotrioside-based saponins either with no functionality or bearing a hydrophobic methylene group at C-12 were the most cytotoxic ones against both HL-60 and benign blood cells. On the other hand, the incorporation of very polar functionalities and the opening of the ring C with the consequent loss of rigidity led to a significant drop in the cytotoxicity against HL-60. These results confirm that spirostanyl beta-chacotriosides including very lipophilic aglycones are the most cytotoxic ones among their congeners. (C) 2012 Elsevier Ltd. All rights reserved.