Basf Aktiengesellschaft

Basf Aktiengsellschaft

Wolf-Dieter Habicher

Thomas Rosenau

Chen-Loung Chen

Udo Rotermund

Antje Ziemer

Harald Streicher

Michael Pcolinski

Peter Böhme

The invention relates to high-functionality polyether polyols of the general formula where each R'is an unsubstituted or substituted aliphatic or aromatic radical and each R&#x2032;is an unsubstituted or substituted aliphatic or aromatic radical, H, OH, polyalkyl ether chain or halogen, each X is a polyalkyl ether chain or H, where at least one X is a polyalkyl ether chain, and m is an integer from 0 to 20, where Xm is H when m is 0, and n is an integer from 4 to 12, to processes for preparing such high-functionality polyether polyols and also to the use thereof for preparing polyurethanes and nonionic surfactants.

High-functionality polyether polyols and preparation thereof

Chromanylascorbic acid derivatives of the general formula I ##STR1## where R.sup.1 is an organic radical having 1 to 12 C atoms, in particular a methyl group,

Chromanylascorbic acid derivatives their preparation and use

A process for the preparation of chromanyl derivatives of the formula I ##STR1## where R.sup.1 is hydrogen, C.sub.1 -C.sub.8 -alkyl, aryl, aralkyl, Si(R.sup.4).sub.3, C(.dbd.O)R.sup.4 or C.sub.1 -C.sub.4 -alkoxymethyl,

Preparation of chromanyl derivatives

The present invention relates to a process for preparing protected amines or amino acids. The invention furthermore relates to the use of tocopheryl radicals or radicals derived therefrom as protective groups for amines and amino acids, and to compounds obtained in this process as intermediates and to processes for preparing dipeptides and oligopeptides.

Growing community of inventors

Dresden, Germany

Wolf-Dieter Habicher