Complementary approaches to the stereoselective preparations of cis and trans aminohydrins
β Scribed by Vincent A. Boyd; Yousuf P. Najjar; Larry A. Ytuarte; Michael M. Savage; Joe B. Perales; Thomas Meehan; George R. Negrete
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- French
- Weight
- 283 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0040-4039
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## Abstract On irradiation (__Ξ»__=350β nm), 1,2βnaphthoquinone (=naphthaleneβ1,2βdione) monoacetals **1** are converted quantitatively to mixtures of the __cisβtransβcis__βphotocyclodimers **2** and **3**. Careful hydrolysis of each of the (parent) pentacyclic diacetals **2a** and **3a** affords the
In connection with other projects we have been seeking a general route to m-(or 3 j3, Yunsaturated aldehydes, in both free and protected form, via a three carbon chain extension which is equivalent to a hypothetical Wittig process from the unknown reagent R3P=CHCH2CH0. We report here the successful