The organozinc prepared from trimethylsilylpropargylbromide regiospecifically reacts with triple bond of monosubstituted alpha-acetylenic alcohols, ethers, amines and bromides, to lead to functional 1-trimethylsilyl-4-en-1-ynes in good yield. These derivatives are easily desilylated to produce functional 1-en-4-ynes.
The organozinc prepared from trimethylsilylpropargylbromide regiospecifically reacts with triple bond of monosubstituted alpha-acetylenic alcohols, ethers, amines and bromides, to lead to functional 1-trimethylsilyl-4-en-1-ynes in good yield. These derivatives are easily desilylated to produce functional 1-en-4-ynes.
Alternaric acid: formal synthesis and related studies
作者:Michael C Slade、Jeffrey S Johnson
DOI:10.3762/bjoc.9.19
日期:——
exploited to achieve a formal synthesis, an analogue to an intermediate in a distinct formal synthetic route, and a third (unique) approach to the natural product alternaric acid. Highlighted in this study is the versatility of silyl glyoxylates to engage a variety of nucleophile and electrophile pairs to provide wide latitude in the approach to complex molecule synthesis.
Synthesis of a new versatile dienophile and its use in a highly diastereoselective Diels-Alder reaction
作者:Jean-Luc Renaud、Corinne Aubert、Max Malacria
DOI:10.1016/s0040-4039(99)00981-8
日期:1999.7
propargyl bromide, the preparation of 2-methylene-5-trimethylsilyl-pent-4-yn-1-ol was improved. This latter is the precursor of the corresponding aldehyde which was used for the first time as a dienophile in [4+2] reactions. The cycloadducts were obtained in very high yields and in a totally diastereoselective manner.
The organozinc prepared from trimethylsilylpropargylbromide regiospecifically reacts with triple bond of monosubstituted alpha-acetylenic alcohols, ethers, amines and bromides, to lead to functional 1-trimethylsilyl-4-en-1-ynes in good yield. These derivatives are easily desilylated to produce functional 1-en-4-ynes.