di(4-pivaloyloxybutyl)zinc

• 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: di(4-pivaloyloxybutyl)zinc
• 英文别名: bis(4-pivaloxybutyl)zinc
• 化学式: C₁₈H₃₄O₄Zn
• 分子量: 379.856
• InChiKey: JADYCBGQDKEMSY-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.38
• 重原子数：
  23
• 可旋转键数：
  10
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.78
• 拓扑面积：
  52.6
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  di(4-pivaloyloxybutyl)zinc 在 三乙烯二胺 、 咪唑 、 titanium(IV) isopropylate 、 sodium periodate 、 potassium dioxotetrahydroxoosmate(VI) 、 potassium carbonate 、 (1R)-反-N,N′-1,2-环己二基双(1,1,1-三氟甲磺酰胺) 、 potassium hexacyanoferrate(III) 作用下， 以 四氢呋喃 、 水 、 N,N-二甲基甲酰胺 、 叔丁醇 为溶剂， 反应 56.5h， 生成 2,2-Dimethyl-propionic acid (S)-6-[(Z)-benzylimino]-5-triisopropylsilanyloxy-hexyl ester
  参考文献：
  名称：

  Catalytic asymmetric synthesis of protected α-hydroxy aldehydes and related 1,2-difunctional chiral building blocks. An enantioselective synthesis of (−)-exo- and (−)-endo-brevicomin

  摘要：

  Chiral allylic alcohols which were prepared by the addition of functionalized dialkylzincs to alpha,beta-unsaturated aldehydes in good to excellent enantioselectivity, were converted to protected alpha-hydroxy aldehydes and 1,2-amino alcohols without loss of enantiomeric purity. Syn- or anti-1,2-diols can be obtained stereoselectively by a second asymmetric addition to alpha-silyloxy aldehydes. Functionalized 1,2-diols prepared in this way were converted to enantiomerically pure (-)-exo- and (-)-endo-brevicomin (>99% ee). (C) 1997 Elsevier Science Ltd.

  DOI：

  10.1016/s0957-4166(97)00036-0

文献信息

• Enantioselective preparation of C2-symmetrical 1,4-diols
  作者：Stephan Vettel、Paul Knochel

  DOI：10.1016/s0040-4039(00)78200-1

  日期：1994.8

  addition of functionalized dialkylzincs to the γ-alkoxyaldehydes 5, 6 and 7 provides 1,4-diols 1–3 with 73–99 %ee. After a simple reaction sequence, these diols are converted to chiral γ-alkoxyaldehydes which undergo a second catalytic enantioselective addition of the same diorganozinc providing C2-symmetrical 1,4-diols 10a–f with excellent diastereoselectivity (up to 97 : 3).

  在γ-烷氧基醛5、6和7上催化官能化的二烷基锌的催化对映选择性加成后，得到1,4-二醇1-3，其ee值为73-99。经过简单的反应序列后，这些二醇被转化为手性的γ-烷氧基醛，对第二种有机锌进行了第二次催化对映选择性加成，从而提供了具有出色的非对映选择性（高达97：3）的C 2对称的1,4-二醇10a-f。
• Catalytic Asymmetric Addition of Alkylzinc and Functionalized Alkylzinc Reagents to Ketones
  作者：Sang-Jin Jeon、Hongmei Li、Celina García、Lynne K. LaRochelle、Patrick J. Walsh

  DOI：10.1021/jo048683e

  日期：2005.1.1

  We describe our full report of the catalytic asymmetric addition of simple and functionalized dialkylzinc reagents to a broad range of saturated ketones and enones. The functionalized organozinc reagents contain esters, silyl ethers, alkyl chlorides, and alkyl bromides. In general, the resulting tertiary alcohol products are isolated with high ee's. With some substrates, yields are low as a result

  我们描述了将简单和功能化的二烷基锌试剂催化不对称添加到各种饱和酮和烯酮中的完整报告。官能化的有机锌试剂包含酯，甲硅烷基醚，烷基氯和烷基溴化物。通常，将所得的叔醇产物与高ee分离。对于某些底物，由于醛醇副产物的形成，收率低。大多数基材都经过添加，其良率高达91％。
• Dramatic titanium alkoxide effect in the catalytic enantioselective addition of dialkylzincs to aldehydes
  作者：Stefan Nowotny、Stephan Vettel、Paul Knochel

  DOI：10.1016/s0040-4039(00)60721-9

  日期：1994.6

  The use of Ti(Ot-Bu)4, or related bulky titanium(IV) alkoxides, as cocatalysts instead of Ti(Oi-Pr)4 in the enantioselective addition of dimethylzinc to aldehydes in the presence of the catalyst 2 (8 mol%) leads to a dramatic improvement of the enantioselectivity (0%ee to 93%ee). The scope and the limitations of this effect are described.

  使用的Ti（O的吨-Bu）4，或相关的笨重的钛（IV）醇盐，作为助催化剂的钛代替（O我-Pr）4在对映选择性加成二甲基锌在催化剂的存在下的醛2（8 mol％）导致对映选择性的显着提高（0％ee至93％ee）。描述了这种效果的范围和局限性。
• New Efficient Nickel-Catalyzed Cross-Coupling Reaction between Two Csp³ Centers
  作者：Riccardo Giovannini、Thomas Stüdemann、Arokiasamy Devasagayaraj、Gaëlle Dussin、Paul Knochel

  DOI：10.1021/jo982317b

  日期：1999.5.1

  carbonyl group, cyano group) in an alkyl halide facilitates its cross-coupling reaction with various diorganozincs in the presence of Ni(acac)(2) (7.5-10 mol % in THF/NMP mixtures). These results were used to develop a new general cross-coupling reaction between functionalized diorganozincs and alkyl iodides using m- or p-trifluoromethylstyrene as a reaction promotor and Ni(acac)(2) as a catalyst (7.5-10

  在Ni（acac）（2）（在THF / NMP中为7.5-10 mol％）的情况下，卤代烷中存在不饱和键（双键，羰基，氰基）有助于其与各种二有机锌的交叉偶联反应混合物）。这些结果被用来开发新的一般的功能化二有机锌和烷基碘之间的交叉偶联反应，使用间或对三氟甲基苯乙烯作为反应促进剂，并使用Ni（acac）（2）作为催化剂（7.5-10 mol％；-35 ℃，5-10 h）导致了广泛的多功能交叉偶联产品。
• Enantioselective synthesis of 1,2-, 1,3- and 1,4- aminoalcohols by the addition of dialkylzincs to 1,2-, 1,3- and 1,4- aminoaldehydes
  作者：Christian Lutz、Volker Lutz、Paul Knochel

  DOI：10.1016/s0040-4020(98)00297-x

  日期：1998.6

  aminoalcohols were prepared by the addition of functionalized dialkylzincs to 1,3-aliphatic and 1,4-unsaturated aminoaldehydes with good to excellent enantioselectivity. Syn- or anti-1,2-aminoalcohols are stereoselectively obtained by asymmetric addition of dialkylzincs to α-aminoaldehydes depending on the choice of the chiral catalyst. A chelate controlled addition is observed if less than stoichiometric

  通过向1，3-脂族和1，4-不饱和氨基醛中添加官能化的二烷基锌，制备手性的1，3-和1，4-氨基醇，对映选择性很好。根据手性催化剂的选择，通过不对称地将二烷基锌加成到α-氨基醛上来立体选择性地获得顺-或抗-1,2-氨基醇。如果使用小于化学计量的Ti（O i -Pr）4，则观察到螯合物受控的添加。