硼烷还原酯
![硼烷也是还原羧酸为醇的优良试剂,分子中的硝基,卤素和酰卤等基团不受](https://imgs.wantubizhi.com/img/A1A61BAA66193547F3A6DD7D8EE527E95B0788EEE4163070B5501923FAF0836857968D0763976448C2B2CC106F1E50EE6F1FCAFD1B40C3615B34392AB67FC07FE1E4A607B51C414C8545C1C17E4C0160F9A5B5DF1A7DFB2752C828B0D6736F20)
硼烷也是还原羧酸为醇的优良试剂,分子中的硝基,卤素和酰卤等基团不受
图片尺寸500x216![乙硼烷能还原酯基吗机理是什么样的或者有什么参考资料](https://imgs.wantubizhi.com/img/735A5D1F980B52A636CC46F12F2D1A73C9F94E82FA1620EBD20F4260AA2FB2C65733268A288A693E5E69E92894598B62D29AE164C6B0713E1A57D9D9C7245B7E9BD21C71D859B807D4154EE5070F7EE3497E61F80BC52EC865D4CD678CF09285)
乙硼烷能还原酯基吗机理是什么样的或者有什么参考资料
图片尺寸554x259![硼氢化钠还原羧酸机理ppt](https://imgs.wantubizhi.com/img/A1A61BAA66193547F3A6DD7D8EE527E9528684A4191929F2A7EB40D4541C2DD178026B1DAAE6D1B166652CCE81A387F17D46DA8DB8E436D470CF561933905DD9FCD03EAB133C8902AE27953B288866E4619347BFF650D25A5E708303C1329F42)
硼氢化钠还原羧酸机理ppt
图片尺寸1080x810![/a>(cbs催化剂)和 a>乙硼烷 /a>的醚溶液催化下被 a>立体选择性还原](https://imgs.wantubizhi.com/img/735A5D1F980B52A636CC46F12F2D1A73E3B8A86F072659D95907494FF20648C6C2FB9B1CBC71A4ECABF4060C0BAD26826D67E1695CF27DC8798F33D4640D417FDE2348941F68B0795D9917C97E4EEFC17C5C4EE4CA3B50E3824237B9B601C766)
/a>(cbs催化剂)和 a>乙硼烷 /a>的醚溶液催化下被 a>立体选择性还原
图片尺寸609x501![/a>(cbs催化剂)和 a>乙硼烷 /a>的醚溶液催化下被 a>立体选择性还原](https://imgs.wantubizhi.com/img/ADDA3C5D760C6828B77B505A29D43E833566DAF08660A36D85F024B3CE2DC91F51487595EF467D8AAD6EF87FD92FE79DF118FB3BB81B0E0ED3BDD4BE77DB11AC3A0C486B70B6825BF9B6BE803716811BE7EFF38F980410902EB0F49A4114C2B7)
/a>(cbs催化剂)和 a>乙硼烷 /a>的醚溶液催化下被 a>立体选择性还原
图片尺寸457x435![/a>(cbs催化剂)和 a>乙硼烷 /a>的醚溶液催化下被 a>立体选择性还原](https://imgs.wantubizhi.com/img/A1A61BAA66193547F3A6DD7D8EE527E950A20CA9AED6AF2ED5908C843945CDEF278DF120F9C25F3FD7D3A4DFF968F22CACB5175F0C8073FA4D71DA1C0D82A7ACC3A83BB7444C6FE90F568FFBA79C07E4DBFEC3304D54748857FCD90A8CC39D54)
/a>(cbs催化剂)和 a>乙硼烷 /a>的醚溶液催化下被 a>立体选择性还原
图片尺寸585x239![/a>(cbs催化剂)和 a>乙硼烷 /a>的醚溶液催化下被 a>立体选择性还原](https://imgs.wantubizhi.com/img/A1A61BAA66193547F3A6DD7D8EE527E9E72088342BD61E4C6F93523B009D8E8D233F3A6767ACEC63828D7191009534D9EC30135AC67B1AAD1CE453DFC74635FCB7749E760092254E9947A0704582FFBC9D37814452651C9852A5471F14B75C2E)
/a>(cbs催化剂)和 a>乙硼烷 /a>的醚溶液催化下被 a>立体选择性还原
图片尺寸584x130![用手性恶唑硼烷催化对映选择性还原酮的反应,被称为corey-bakshi](https://imgs.wantubizhi.com/img/ADDA3C5D760C6828B77B505A29D43E83DD72FF87EE13ACF07D22FC6152EEC2F7FAD54FF8AF8A3A29430090C35A1D29728A3D225224BBA6F3377AC19B863BD1F25B85443806C0A28BF1507D47CEBE172960065BE6A5903CC62289F6C8B902C01C)
用手性恶唑硼烷催化对映选择性还原酮的反应,被称为corey-bakshi
图片尺寸376x370![/a>(cbs催化剂)和 a>乙硼烷 /a>的醚溶液催化下被 a>立体选择性还原](https://imgs.wantubizhi.com/img/A1A61BAA66193547F3A6DD7D8EE527E916B715AAF3CD7BC3D75962334F5B04E945FFBD43FB8CBC71B9DDA68249D85C9AAF2A7B2F3EDC385AE7F96802F67153E2ADBD085ACB7EB62B85BF36E00F4C85571957BE401D01DAC2775D338D7C945004)
/a>(cbs催化剂)和 a>乙硼烷 /a>的醚溶液催化下被 a>立体选择性还原
图片尺寸639x576![硼氢化钠还原羧酸机理ppt](https://imgs.wantubizhi.com/img/735A5D1F980B52A636CC46F12F2D1A7305CFFFC4762463A31FF5938AA4F51A6EDE73476E8461B585B3A6AFE2D57BAA506A226E6883E66F83FBC9C24511822D5C1F3C294B97932C0E14E047CEAF486F56217380E33410C1F7CC2F16FF6484A8A6)
硼氢化钠还原羧酸机理ppt
图片尺寸1080x810![硼烷配体boranecomplexbh399l](https://imgs.wantubizhi.com/img/735A5D1F980B52A636CC46F12F2D1A733B6FEC883510C01C8AFB90CE75C28C09DCA19C5138FA1BFC0DB2E7EE46D9709256241090ECE9BCF9A460FA7C4366E3020CC8BC0BCD4CFB1626E8006D06086CC525AB2DE5E32E307B2C6A8732BC2318EE)
硼烷配体boranecomplexbh399l
图片尺寸529x221![还原剂之硼烷 ,diisopropylaminoborane](https://imgs.wantubizhi.com/img/A1A61BAA66193547F3A6DD7D8EE527E97E21F018CEDDD80B17476913132871AE7B9190AB9E49362FDD5247406BFBD86D491963B648FE4331627785709138ADF8D832A8007E045F13E8BD7AD9AD1DD2CA086E52FC959C68500571323B417E25AA)
还原剂之硼烷 ,diisopropylaminoborane
图片尺寸363x186![硼氢化钠还原全文](https://imgs.wantubizhi.com/img/ADDA3C5D760C6828B77B505A29D43E83774F07FD01CE97DEA9AA3D7E0AC6C27762F21AA6B91D915DF779F178C93AAB3C0C3BE7417A3BB833762166ECE98E11C16D130709C9461CA1AA4E465C503CAD69722585369E40B9F893260A043484CC9B)
硼氢化钠还原全文
图片尺寸800x1132![硼烷为亲电性还原剂,首先是由缺电子的硼原子和羰基氧原子上未共用](https://imgs.wantubizhi.com/img/A1A61BAA66193547F3A6DD7D8EE527E9B06CC8F2DFEC56DD652428FF388ED1D583BB8425E19F3CBE2C50B83F793178561773A665EBF51AEB23873167AE3B080A5C364322E734BA1DCEFF83BB567CFB7CCF03F21D387B9AB8601E7D1EF3EE0D65)
硼烷为亲电性还原剂,首先是由缺电子的硼原子和羰基氧原子上未共用
图片尺寸509x193![酯被还原成醇](https://imgs.wantubizhi.com/img/735A5D1F980B52A636CC46F12F2D1A730F032B9CDBC890F9853658B89E0EB43F0947D0E7F8F116B8B3AD4EE62B1A6ECF05432D999572627EFA42C78A7BD5D1B514BDCA6E12FF0ED1EFB35736C447F58C313FE6F29F43C74B07647FD2D9E7EB90)
酯被还原成醇
图片尺寸1049x478![但却发现了硼烷对有机羰基化合物的还原能力](https://imgs.wantubizhi.com/img/ADDA3C5D760C6828B77B505A29D43E83B130493912E971524D38715D88CAEFB45523FDC2E8F03644899BA91FC2B79338AEA285530DABC96850E71FC034DDB87409ED08A35FD1DDC5B76B40CFBD093E20DBEC1EF842D8125E2C925264ABB77C10)
但却发现了硼烷对有机羰基化合物的还原能力
图片尺寸981x639![天然产物发酵所得,结合信息①可初步断定u为葡萄糖(或其他还原性单糖)](https://imgs.wantubizhi.com/img/735A5D1F980B52A636CC46F12F2D1A73BE2784D0C4EE0AFA7891B0418763D6EB1962D7065285A8B70DDBC018CB853E1EB93ECC5DB70980F4016F119FEFE70F0291830E83441EC9C1043C3A422AC8E46F6B494C01D91D671FBEFA5E1F7354FDCB)
天然产物发酵所得,结合信息①可初步断定u为葡萄糖(或其他还原性单糖)
图片尺寸1155x553![图2 可能的酰胺还原的机理](https://imgs.wantubizhi.com/img/735A5D1F980B52A636CC46F12F2D1A731B7E2634042C3BC7345DF45FEF234843B2978833B8BF8D2F4F952F5536E904A90AB4E37037341157AA2162034A76E8B473716AFD3D634BDC05F4DC8E10FC657054632F275586A1889DBB86E022B1EBA3)
图2 可能的酰胺还原的机理
图片尺寸951x366![在羧酸的还原过程中,可能是先生成三酰氧基硼烷,然后酰氧基中氧原子上](https://imgs.wantubizhi.com/img/A1A61BAA66193547F3A6DD7D8EE527E93FD252C8BB7FE99980E9A4639E3A16C518FA50E3D7D0993CE9CD0140DD79E8E2646540C4DC5720D1D3401BB58297ED6A43C23601AD7218FEF257D393EC83712CE13B5810A4021831F72AE1543848B3C5)
在羧酸的还原过程中,可能是先生成三酰氧基硼烷,然后酰氧基中氧原子上
图片尺寸570x232![硼氢化氧化机理](https://imgs.wantubizhi.com/img/735A5D1F980B52A636CC46F12F2D1A7395C944900E40A9AB24B07610A8ED0B72A9BEFF4B35E37A538657C6AA0888266A374006D1F8A14EECD36C2101B4F6BE748E20E3858560EE247E73710650A9D1C79625C2F8F67CCAF71CA362C3B357FF46)
硼氢化氧化机理
图片尺寸412x339