Ena

Ena or ENA may refer to:

Organizations

Places

Science and technology

Ena (gastropod)

Ena is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Enidae.

Species

Species within the genus Ena include:

References

Ena (album)

Ena (Greek: Ένα; "One") is the eighth studio album by the popular Greek artist Peggy Zina, recorded at Diogenes Studio and released on November 8, 2006, by Minos EMI. In August 2007, it was repackaged with Zina's single "Mystiko" and named Ena New Edition.

Track listing

Singles

The following songs from the album were released as radio singles and each featured a music video:

"Ena"

"Ego Ta Spao"

"Eimai Edo"

Chart performance

The Special Edition of the album remained on the Cypriot Album Chart for more than 52 weeks

References

Diethylaminosulfur trifluoride

Diethylaminosulfur trifluoride (DAST) is the organosulfur compound with the formula Et₂NSF₃. This liquid is a fluorinating reagent used for the synthesis of organofluorine compounds. The compound is colourless; older samples assume an orange colour.

Use in organic synthesis

DAST converts alcohols to the corresponding alkyl fluorides as well as aldehydes and unhindered ketones to geminal difluorides. Carboxylic acids react no further than the acyl fluoride (sulfur tetrafluoride effects the transformation —CO₂H → —CF₃). DAST is used in preference to the more classical gaseous SF₄, since as a liquid it is more easily handled. Acid-labile substrates are less likely to undergo rearrangement and elimination since DAST is less prone to contamination with acids. Reaction temperatures are milder as well - alcohols typically react at -78 °C and ketones around 0 °C.

Synthesis

DAST is prepared by the reaction of diethylaminotrimethylsilane and sulfur tetrafluoride:

The Organic Syntheses protocol calls for trichlorofluoromethane as a solvent, a compound that has been banned under the Montreal Protocol and is no longer available as a commodity chemical. Diethyl ether may be used instead with no decrease in yield. Because of the dangers involved in the preparation of DAST (glass etching, possibility of exothermic events), it is often purchased from a commercial source. At one time Carbolabs was one of the few suppliers of the chemical but a number of companies now sell DAST.