Efficient synthesis of 3-substituted lactams using meerwein eschenmoser claisen [3,3] sigmatropic rearrangements.
作者:Brian Coates、David Montgomery、Paul J. Stevenson
DOI:10.1016/s0040-4039(00)79904-7
日期:1991.8
3-Allyl substituted five, six and seven membered ring lactams are readily available in good yields and reasonable selectivity by a formal Meerwein Eschenmoser Claisen [3,3] rearrangement, using the readily available N,N-dialkylalkoxymethylene iminium salts and lithium alkoxides derived from allyl alcohols.
Complex Allylation by the Direct Cross-Coupling of Imines with Unactivated Allylic Alcohols
作者:Masayuki Takahashi、Martin McLaughlin、Glenn C. Micalizio
DOI:10.1002/anie.200900236
日期:2009.5.4
stereoselective: The convergent coupling of allylic alcohols with imines to deliver stereodefined homoallylic amines is described (see scheme). The process proceeds with net allylic transposition without the intermediacy of allylic organometallic reagents. Two stereodefined centers and a geometrically defined di‐ or trisubstitutedalkene are forged with high selectivity.
Regio- and Enantiospecific Rhodium-Catalyzed Allylic Etherification Reactions Using Copper(I) Alkoxides: Influence of the Copper Halide Salt on Selectivity
作者:P. Andrew Evans、David K. Leahy
DOI:10.1021/ja026337d
日期:2002.7.1
The transition metal-catalyzed allylic etherification represents a fundamentally important cross-coupling reaction for the construction of allylic ethers. We have developed a new regio- and enantiospecific rhodium-catalyzed allylic etherification of acyclic unsymmetrical allylic alcohol derivatives using copper(I) alkoxides derived from primary, secondary and tertiary alcohols. This study demonstrates
Ti(O<i>i</i>Pr)<sub>4</sub>-Mediated Multicomponent Reactions Involving Triple Additions to Isonitrile Carbon Atoms
作者:Francesco Foschi、Torsten Roth、Hubert Wadepohl、Lutz H. Gade
DOI:10.1021/acs.orglett.6b02746
日期:2016.10.7
Double addition of Grignard reagents to isonitriles was achieved in the presence of stoichiometric amounts of [Ti(OiPr)4]. Functionalized isonitrile components were obtained in situ via lithiation of chiral and achiral 2-oxazolines, and the resulting amidomethyltitanium intermediate further reacted with a range of electrophiles. The established multicomponent procedure gave rise to highly substituted
在化学计量的[Ti(O i Pr)4 ]存在下,将格氏试剂双加到异腈中。通过手性和非手性2-恶唑啉的锂化原位获得官能化的异腈组分,并且所得的酰胺基甲基钛中间体进一步与一系列亲电试剂反应。既定的多组分方法通过简单的合成方法产生了高度取代的2-氨基吗啉,无环二氨基醇和异戊烯基化的氨基醇。
Synthesis of Substituted 1,4-Dienes by Direct Alkylation of Allylic Alcohols
作者:Filip Kolundzic、Glenn C. Micalizio
DOI:10.1021/ja075678u
日期:2007.12.1
A regio- and stereoselective cross-coupling reaction between unactivated allylic alcohols and alkynes is described for the synthesis of 1,4-dienes.